diff --git a/src/App.vue b/src/App.vue
index d5d59c7..ca02ea5 100644
--- a/src/App.vue
+++ b/src/App.vue
@@ -1,15 +1,16 @@
 <script setup lang="ts">
+import type { Block, Direction, Item, InventoryItem } from './types.d'
 import { ref, computed, watch, onMounted } from 'vue'
 import Help from './screens/help.vue'
 import Inventory from './screens/inventory.vue'
 
-import { BLOCK_SIZE, STAGE_WIDTH, STAGE_HEIGHT, type Block } from './level/def'
+import { BLOCK_SIZE, STAGE_WIDTH, STAGE_HEIGHT } from './level/def'
 import { getItem, getItemClass } from './level/items'
 import createLevel from './level'
 
+import usePlayer from './util/usePlayer'
 import useTime from './util/useTime'
 import useInput from './util/useInput'
-import usePlayer, { type InventoryItem } from './util/usePlayer'
 import useLightMap from './util/useLightMap'
 
 const { updateTime, time, timeOfDay, clock } = useTime()
@@ -20,9 +21,9 @@ const level = createLevel(STAGE_WIDTH + 2, STAGE_HEIGHT + 2)
 const lightMapEl = ref<HTMLCanvasElement | undefined>(undefined)
 let updateLightMap: ReturnType<typeof useLightMap>
 
-pocket({ name: 'Shovel', type: 'tool', icon: 'shovel', quality: 'wood' })
-pocket({ name: 'Sword', type: 'weapon', icon: 'sword', quality: 'wood' })
-pocket({ name: 'Pick Axe', type: 'tool', icon: 'pick', quality: 'wood' })
+pocket({ name: 'Wooden Shovel', type: 'tool', icon: 'shovel', quality: 'wood' })
+pocket({ name: 'Wooden Sword', type: 'tool', icon: 'sword', quality: 'wood' })
+pocket({ name: 'Wooden Pick Axe', type: 'tool', icon: 'pick', quality: 'wood' })
 
 let animationFrame = 0
 let lastTick = 0
@@ -54,14 +55,7 @@ const arriving = ref(true)
 const walking = ref(false)
 const inventorySelection = ref<InventoryItem>(player.inventory[0])
 
-type Surroundings = {
-  at: Block,
-  left: Block,
-  right: Block,
-  up: Block,
-  down: Block,
-}
-const surroundings = computed<Surroundings>(() => {
+const surroundings = computed<Record<Direction, Block>>(() => {
   const _update = mapUpdateCount.value // reactivity trigger
   const x = px.value
   const y = py.value
@@ -100,7 +94,7 @@ function dig(blockX: number, blockY: number, block: Block) {
   // finally dig that block
   // TODO: damage blocks first
   level.change({
-    type: 'exchange',
+    change: 'exchange',
     x: floorX.value + blockX,
     y: floorY.value + blockY,
     newType: 'air'
@@ -120,14 +114,14 @@ function build(blockX: number, blockY: number, block: InventoryItem) {
   if (!blockToBuild) return
 
   level.change({
-    type: 'exchange',
+    change: 'exchange',
     x: floorX.value + blockX,
     y: floorY.value + blockY,
     newType: blockToBuild
   })
   mapUpdateCount.value = mapUpdateCount.value + 1
 
-  const newAmount = unpocket(block)
+  const newAmount = unpocket(block as Item)
   if (newAmount < 1) inventorySelection.value = player.inventory[0]
 }
 
@@ -268,8 +262,6 @@ onMounted(() => {
       x:{{ floorX }}, y:{{ floorY }}
       <template v-if="paused">(PAUSED)</template>
       <template v-else>({{ clock }})</template>
-      <br/>
-      Map Changes: {{ mapUpdateCount }}
     </div>
 
     <Inventory :shown="inventory"
diff --git a/src/assets/items.css b/src/assets/items.css
index a137329..49d2176 100644
--- a/src/assets/items.css
+++ b/src/assets/items.css
@@ -1,7 +1,15 @@
 .item.tool-shovel-wood { background-image: url("/Items/shovel_bronze.png"); }
-.item.weapon-sword-wood { background-image: url("/Items/sword_bronze.png"); }
+.item.tool-sword-wood { background-image: url("/Items/sword_bronze.png"); }
 .item.tool-pick-wood { background-image: url("/Items/pick_bronze.png"); }
 
+.item.tool-shovel-iron { background-image: url("/Items/shovel_iron.png"); }
+.item.tool-sword-iron { background-image: url("/Items/sword_iron.png"); }
+.item.tool-pick-iron { background-image: url("/Items/pick_iron.png"); }
+
+.item.tool-shovel-diamond { background-image: url("/Items/shovel_diamond.png"); }
+.item.tool-sword-diamond { background-image: url("/Items/sword_diamond.png"); }
+.item.tool-pick-diamond { background-image: url("/Items/pick_diamond.png"); }
+
 .item.block-wood { background-image: url("/Tiles/wood.png"); }
 .item.block-dirt { background-image: url("/Tiles/dirt.png"); }
 .item.block-stone { background-image: url("/Tiles/stone.png"); }
diff --git a/src/level/blockExt.ts b/src/level/blockExt.ts
index 0bb8401..7117e30 100644
--- a/src/level/blockExt.ts
+++ b/src/level/blockExt.ts
@@ -1,5 +1,6 @@
 import type { NoiseFunction2D } from 'simplex-noise'
-import {blockTypes as T, level as L, probability as P, type Block} from './def'
+import { blockTypes as T, level as L, probability as P } from './def'
+import type { Block } from '../types.d'
 
 const TREE_ROOT = [T.treeRootLeft, T.treeRootMiddle, T.treeRootRight]
 
diff --git a/src/level/blockGen.ts b/src/level/blockGen.ts
index badb071..bab2301 100644
--- a/src/level/blockGen.ts
+++ b/src/level/blockGen.ts
@@ -1,5 +1,6 @@
 import type { NoiseFunction2D } from 'simplex-noise'
-import {blockTypes as T, level as L, probability as P, type Block} from './def'
+import { blockTypes as T, level as L, probability as P } from './def'
+import type { Block } from '../types.d'
 
 export default function createBlockGenerator(rand: NoiseFunction2D) {
   // randomly generate a block
diff --git a/src/level/def.ts b/src/level/def.ts
index 6f580e0..d09b3c3 100644
--- a/src/level/def.ts
+++ b/src/level/def.ts
@@ -1,6 +1,6 @@
-import type { DropItem } from './items'
+import type { Block, BlockType } from '../types.d'
 
-export const BLOCK_SIZE = 64 // each block is 64̨̣̌̇x64 pixel in size and equals 1m
+export const BLOCK_SIZE = 64 // each block is 64x64 px in size and equals 1m
 export const RECIPROCAL = 1 / BLOCK_SIZE
 
 export const STAGE_WIDTH = 20 // 20*64 = 1280 pixel wide stage
@@ -9,23 +9,6 @@ export const STAGE_HEIGHT = 12 // 12*64 = 768 pixel high stage
 
 export const GRAVITY = 10 // blocks per second
 
-export type Block = {
-  type: string,          // what is it?
-  hp: number,            // how long do I need to hit it?
-  walkable: boolean,     // can I walk through it?
-  climbable?: boolean,   // can I climb it?
-  transparent?: boolean, // can I see through it?
-  illuminated?: boolean, // is it glowing?
-  drops?: DropItem,        // what do I get, when loot it?
-}
-
-export type BlockType =
-  | 'air' | 'grass'
-  | 'treeCrown' | 'treeLeaves' | 'treeTrunk' | 'treeRoot'
-  | 'soil' | 'soilGravel' | 'stone' | 'stoneGravel'
-  | 'bedrock' | 'cave'
-  | 'brickWall'
-
 export const blockTypes: Record<BlockType, Block> = {
   // Transparent Blocks
   air: { type: 'air', hp: Infinity, walkable: true, transparent: true },
@@ -35,6 +18,9 @@ export const blockTypes: Record<BlockType, Block> = {
   treeLeaves: { type: 'treeLeaves', hp: 1, walkable: true, transparent: true, drops: 'leaves' },
   treeTrunk: { type: 'treeTrunk', hp: 10, walkable: true, climbable: true, transparent: true, drops: 'wood' },
   treeRoot: { type: 'treeRoot', hp: 10, walkable: true, climbable: true, drops: 'wood' },
+  treeRootLeft: { type: 'treeRootLeft', hp: 10, walkable: true, climbable: true, drops: 'wood' },
+  treeRootMiddle: { type: 'treeRootMiddle', hp: 10, walkable: true, climbable: true, drops: 'wood' },
+  treeRootRight: { type: 'treeRootRight', hp: 10, walkable: true, climbable: true, drops: 'wood' },
   // Opaque Natural Blocks
   grass: { type: 'grass', hp: 5, walkable: false, drops: 'dirt' },
   soil: { type: 'soil', hp: 5, walkable: false, drops: 'dirt' },
diff --git a/src/level/index.ts b/src/level/index.ts
index 5aaf41e..9ebcd7b 100644
--- a/src/level/index.ts
+++ b/src/level/index.ts
@@ -3,22 +3,8 @@ import { createNoise2D, type NoiseFunction2D } from 'simplex-noise'
 import createBlockGenerator from './blockGen'
 import createBlockExtender from './blockExt'
 
-import {blockTypes, blockTypes as T, level as L, type Block, type BlockType} from './def'
-
-// describes a changed block, eg digged or placed by the player
-type DamagedBlock = {
-  type: 'damage'
-  x: number
-  y: number
-  damage: number
-}
-type ChangedBlock = {
-  type: 'exchange'
-  x: number
-  y: number
-  newType: BlockType
-}
-type Change = DamagedBlock | ChangedBlock
+import { blockTypes, blockTypes as T } from './def'
+import type { Block, Change } from '../types.d'
 
 const MAX_LIGHT = 100 // maximum level where light shines
 
@@ -50,7 +36,7 @@ export default function createLevel(width: number, height: number, seed = 'extre
       if (changes) {
         const maxLevel = levelOffset + height
         changes.forEach(c => {
-          if (c.type !== 'exchange' || c.y < levelOffset || c.y >= maxLevel) return
+          if (c.change !== 'exchange' || c.y < levelOffset || c.y >= maxLevel) return
           _grid[c.y - levelOffset][c.x - columnOffset] = blockTypes[c.newType]
         })
       }
@@ -71,7 +57,7 @@ export default function createLevel(width: number, height: number, seed = 'extre
         const changes = _changes[columnOffset + col]
         if (changes) {
           const change = changes.find(c => c.y === level)
-          if (change && change.type === 'exchange') block = blockTypes[change.newType]
+          if (change && change.change === 'exchange') block = blockTypes[change.newType]
         }
 
         previousBlock = block
@@ -107,7 +93,7 @@ export default function createLevel(width: number, height: number, seed = 'extre
   let lastGenY = 0
   generate(0, 0)
 
-  function grid(x: number, y: number, force: false): Block[][] {
+  function grid(x: number, y: number, force = false): Block[][] {
     if (force || lastGenX !== x || lastGenY !== y) {
       generate(x, y)
       lastGenX = x
diff --git a/src/level/items.ts b/src/level/items.ts
index 5398caa..aa7645d 100644
--- a/src/level/items.ts
+++ b/src/level/items.ts
@@ -1,26 +1,21 @@
-import type { BlockType } from './def'
-import type { InventoryItem } from '../util/usePlayer'
-
-export type ItemQuality = 'wood' | 'iron' | 'silver' | 'gold' | 'diamond'
-export type ItemType = 'tool' | 'weapon' | 'block' | 'ore'
-
-export type DropItem =
-  | 'Shovel' | 'Pick Axe' | 'Sword'
-  | 'leaves' | 'dirt' | 'wood' | 'stone' | 'gravel'
-  | 'coal' | 'iron' | 'silver' | 'gold' | 'ruby' | 'diamond' | 'emerald'
-
-export interface Item {
-  name: DropItem
-  type: ItemType
-  icon: string
-  hasQuality?: boolean
-  builds?: BlockType
-}
+import type { ItemQuality, Item, InventoryItem } from '../types.d'
 
 export const items: Item[] = [
-  { name: 'Shovel', type: 'tool', icon: 'shovel', hasQuality: true },
-  { name: 'Pick Axe', type: 'tool', icon: 'pick', hasQuality: true },
-  { name: 'Sword', type: 'weapon', icon: 'sword', hasQuality: true },
+  { name: 'Wooden Shovel', type: 'tool', icon: 'shovel', quality: 'wood' },
+  { name: 'Wooden Pick Axe', type: 'tool', icon: 'pick', quality: 'wood' },
+  { name: 'Wooden Sword', type: 'tool', icon: 'sword', quality: 'wood' },
+
+  { name: 'Iron Shovel', type: 'tool', icon: 'shovel', quality: 'iron' },
+  { name: 'Iron Pick Axe', type: 'tool', icon: 'pick', quality: 'iron' },
+  { name: 'Iron Sword', type: 'tool', icon: 'sword', quality: 'iron' },
+
+  { name: 'Diamond Shovel', type: 'tool', icon: 'shovel', quality: 'diamond' },
+  { name: 'Diamond Pick Axe', type: 'tool', icon: 'pick', quality: 'diamond' },
+  { name: 'Diamond Sword', type: 'tool', icon: 'sword', quality: 'diamond' },
+
+  { name: 'Wooden Shovel', type: 'tool', icon: 'shovel', quality: 'wood' },
+  { name: 'Wooden Pick Axe', type: 'tool', icon: 'pick', quality: 'wood' },
+  { name: 'Wooden Sword', type: 'tool', icon: 'sword', quality: 'wood' },
 
   { name: 'leaves', type: 'block', icon: 'leaves', builds: 'treeLeaves' },
   { name: 'dirt', type: 'block', icon: 'dirt', builds: 'soil' },
@@ -39,13 +34,11 @@ export const items: Item[] = [
 
 export const damage: Record<ItemQuality, number> = {
   wood: 1,
-  iron: 2,
-  silver: 3,
-  gold: 5,
-  diamond: 8,
+  iron: 3,
+  diamond: 5,
 }
 
-export function getItem(name: string, quality = null) {
+export function getItem(name: string, quality?: ItemQuality) {
   const item = items.find(i => i.name === name)
   if (item) {
     return {
diff --git a/src/screens/inventory.vue b/src/screens/inventory.vue
index 5b32ec2..4788ef0 100644
--- a/src/screens/inventory.vue
+++ b/src/screens/inventory.vue
@@ -1,7 +1,7 @@
 <script setup lang="ts">
 import { ref, computed, onUnmounted } from 'vue'
 import { getItemClass } from '../level/items'
-import type { InventoryItem } from '../util/usePlayer'
+import type { InventoryItem } from '../types.d'
 
 export interface Props {
   items: InventoryItem[]
@@ -10,7 +10,7 @@ export interface Props {
 
 const props = defineProps<Props>()
 const emit = defineEmits<{
-  (event: 'selection', value: InventoryItem | null): void
+  (event: 'selection', value: InventoryItem): void
 }>()
 
 // inventory size is 15
diff --git a/src/types.d.ts b/src/types.d.ts
index 8203488..e77acd2 100644
--- a/src/types.d.ts
+++ b/src/types.d.ts
@@ -1,8 +1,10 @@
-export type ItemQuality = 'wood' | 'iron' | 'silver' | 'gold' | 'diamond'
-export type ItemType = 'tool' | 'weapon' | 'block' | 'ore'
+export type ItemQuality = 'wood' | 'iron' | 'diamond'
+export type ItemType = 'tool' | 'block' | 'ore'
 
 export type DropItem =
-  | 'Shovel' | 'Pick Axe' | 'Sword'
+  | 'Wooden Shovel' | 'Iron Shovel' | 'Diamond Shovel'
+  | 'Wooden Pick Axe' | 'Iron Pick Axe' | 'Diamond Pick Axe'
+  | 'Wooden Sword' | 'Iron Sword' | 'Diamond Sword'
   | 'leaves' | 'dirt' | 'wood' | 'stone' | 'gravel'
   | 'coal' | 'iron' | 'silver' | 'gold' | 'ruby' | 'diamond' | 'emerald'
 
@@ -10,12 +12,29 @@ export interface Item {
   name: DropItem
   type: ItemType
   icon: string
-  hasQuality?: boolean
+  quality?: ItemQuality
   builds?: BlockType
 }
 
+export interface ToolItem extends Item {
+  type: 'tool'
+  quality: ItemQuality
+}
+
+export interface BlockItem extends Item {
+  type: 'block'
+  builds: BlockType
+}
+
+export type BlockType =
+  | 'air' | 'grass'
+  | 'treeCrown' | 'treeLeaves' | 'treeTrunk' | 'treeRoot' | 'treeRootRight' | 'treeRootMiddle' | 'treeRootLeft'
+  | 'soil' | 'soilGravel' | 'stone' | 'stoneGravel'
+  | 'bedrock' | 'cave'
+  | 'brickWall'
+
 export type Block = {
-  type: string,          // what is it?
+  type: BlockType,       // what is it?
   hp: number,            // how long do I need to hit it?
   walkable: boolean,     // can I walk through it?
   climbable?: boolean,   // can I climb it?
@@ -24,12 +43,20 @@ export type Block = {
   drops?: DropItem,      // what do I get, when loot it?
 }
 
-export type BlockType =
-  | 'air' | 'grass'
-  | 'treeCrown' | 'treeLeaves' | 'treeTrunk' | 'treeRoot'
-  | 'soil' | 'soilGravel' | 'stone' | 'stoneGravel'
-  | 'bedrock' | 'cave'
-  | 'brickWall'
+// describes a changed block, eg digged or placed by the player
+type DamagedBlock = {
+  change: 'damage'
+  x: number
+  y: number
+  damage: number
+}
+type ChangedBlock = {
+  change: 'exchange'
+  x: number
+  y: number
+  newType: BlockType
+}
+type Change = DamagedBlock | ChangedBlock
 
 export interface InventoryItem extends Item {
   amount: number
@@ -52,3 +79,6 @@ export interface Npc extends Moveable {
 export interface Player extends Moveable {
   inventory: InventoryItem[]
 }
+
+export type Direction = 'at' | 'left' | 'right' | 'up' | 'down'
+
diff --git a/src/util/useBackground.ts b/src/util/useBackground.ts
index 3a0a587..962a20d 100644
--- a/src/util/useBackground.ts
+++ b/src/util/useBackground.ts
@@ -135,11 +135,11 @@ export default function useBackground (canvasEl: HTMLCanvasElement, w: number, h
   const grH = h / rayQuality
 
   const ctx = canvasEl.getContext('2d')
-  if (ctx === null) return // like, how old is your browser?
+  if (ctx === null) return () => {} // like, how old is your browser?
 
   const grCanvasEl = document.createElement('canvas')
   const grCtx = grCanvasEl.getContext('2d')
-  if (grCtx === null) return // like, how old is your browser?
+  if (grCtx === null) return () => {} // for real, how old is it?
 
   grCanvasEl.width = grW
   grCanvasEl.height = grH
diff --git a/src/util/useLightMap.ts b/src/util/useLightMap.ts
index bdd9b75..16bcf15 100644
--- a/src/util/useLightMap.ts
+++ b/src/util/useLightMap.ts
@@ -1,14 +1,16 @@
-import type { ComputedRef } from 'vue'
+import type { Ref, ComputedRef } from 'vue'
 import { BLOCK_SIZE, STAGE_WIDTH, STAGE_HEIGHT } from '../level/def'
 
+type RefOrComputed<T> = Ref<T> | ComputedRef<T>
+
 export default function useLightMap(
   ctx: CanvasRenderingContext2D,
-  x: ComputedRef<number>,
-  y: ComputedRef<number>,
-  tx: ComputedRef<number>,
-  ty: ComputedRef<number>,
-  time: ComputedRef<number>,
-  lightBarrier: ComputedRef<number[]>,
+  x: RefOrComputed<number>,
+  y: RefOrComputed<number>,
+  tx: RefOrComputed<number>,
+  ty: RefOrComputed<number>,
+  time: RefOrComputed<number>,
+  lightBarrier: RefOrComputed<number[]>,
 ) {
   const W = ((STAGE_WIDTH + 2) * BLOCK_SIZE)
   const H = ((STAGE_HEIGHT + 2) * BLOCK_SIZE)
diff --git a/src/util/usePlayer.ts b/src/util/usePlayer.ts
index b2cc59a..1b63c1a 100644
--- a/src/util/usePlayer.ts
+++ b/src/util/usePlayer.ts
@@ -1,15 +1,6 @@
 import { computed, reactive } from 'vue'
 import { RECIPROCAL, STAGE_WIDTH, STAGE_HEIGHT } from '../level/def'
-import type { Item, ItemQuality } from '../level/items'
-
-export interface InventoryItem extends Item {
-  amount: number
-  quality: ItemQuality | null
-}
-
-export interface Player extends Moveable {
-  inventory: InventoryItem[]
-}
+import type { Item, Player } from '../types.d'
 
 const player = reactive<Player>({
   x: Math.round((STAGE_WIDTH + 2) / 2),
@@ -17,7 +8,7 @@ const player = reactive<Player>({
   lastDir: 0,
   vx: 0,
   vy: 1, // always falling, because of gravity
-  inventory: [], // not yet in use
+  inventory: [],
 })
 
 const pocket = (newItem: Item) => {
diff --git a/src/vite-env.d.ts b/src/vite-env.d.ts
index 0be5bcb..75f56c6 100644
--- a/src/vite-env.d.ts
+++ b/src/vite-env.d.ts
@@ -1,18 +1,6 @@
 /// <reference types="vite/client" />
 
 declare global {
-  interface Moveable {
-    x: number // position on x-axis (fixed for the player)
-    y: number // position on y-axis (fixed for the player)
-    lastDir: number // store last face direction
-    vx: number // velocity on the x-axis
-    vy: number // velocity on the y-axis
-  }
-
-  interface Npc extends Moveable {
-    hostile: boolean
-    inventory: InventoryItem[]
-  }
 }
 
 export {}