snake can now die, score is available

src/App.vue

@@ -1,11 +1,11 @@
 <script setup lang="ts">
 import { Ref, ref } from 'vue';
 
-
 const grid = ref(genGrid(30, 30))
 const currentCoin = ref(spawnCoin())
-const direction: Ref<'left' | 'right' | 'top' | 'bottom' | undefined> = ref('right')
+const direction: Ref<'left' | 'right' | 'top' | 'bottom' | undefined> = ref(undefined)
 const snake = ref(spawnSnake())
+const score = ref(0)
 
 interface Cell {
     x: number
@@ -72,13 +72,17 @@ function randomCell() {
 
 function moveSnake(x: number, y: number) {
     const current = snake.value.cell
-    const newCell = grid.value[current.x + x][current.y + y]
+	const newCell = getCell(current.x + x, current.y + y);
+
+	if (newCell === undefined || newCell.color === 'green') {
+		death()
+		return;
+	}
 
     newCell.color = 'green'
     snake.value.cell = newCell
     snake.value.history.push(newCell)
 
-    
     if (snake.value.history.length > length) {
         const currentLength = snake.value.history.length
         const allowedLength = snake.value.length
@@ -90,6 +94,36 @@ function moveSnake(x: number, y: number) {
 }
 
 
+function getCell(x: number, y: number) {
+	try {
+		return grid.value[x][y]
+	} catch {
+		return undefined
+	}
+}
+
+function death() {
+	killSnake()
+	killCoin()
+	currentCoin.value = spawnCoin()
+	snake.value = spawnSnake()
+	direction.value = undefined;
+	score.value = 0
+}
+
+function killSnake() {
+	snake.value.history
+	for (const cell of snake.value.history) {
+		cell.color = 'white'
+	}
+}
+
+function killCoin() {
+	const coinCell = grid.value[currentCoin.value.x][currentCoin.value.y]
+	coinCell.color = 'white'
+}
+
+
 setInterval(() => {
 
     if (direction.value === undefined) {
@@ -115,8 +149,8 @@ setInterval(() => {
     if (currentCoin.value.x === snake.value.cell.x && currentCoin.value.y === snake.value.cell.y) {
         snake.value.length++
         currentCoin.value = spawnCoin()
+		score.value++
     }
-
 }, 500);
 
 
@@ -138,6 +172,7 @@ window.addEventListener('keydown', keydown)
 </script>
 
 <template>
+	<h1>Score {{  score  }}</h1>
     <div class="grid" @keyup="keydown($event)">
         <div class="row" v-for="row in grid">
             <div class="cell" :class="`cell-${cell.y}-${cell.x}`" v-for="cell in row"