fix lighting and this one weird bug in player changes when ascending

.gitignore

@@ -22,3 +22,6 @@ dist-ssr
 *.njsproj
 *.sln
 *.sw?
+
+# old source code for reference?!
+src/old

src/level/index.ts

@@ -50,7 +50,7 @@ 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.type !== 'exchange' || c.y < levelOffset || c.y >= maxLevel) return
           _grid[c.y - levelOffset][c.x - columnOffset] = blockTypes[c.newType]
         })
       }

src/util/useLightMap.ts

@@ -58,11 +58,8 @@ export default function useLightMap(
   function drawLights() {
     // used for everything above ground
     const ambientLight = getAmbientLightColor()
-    const reflectedLight = ambientLight.slice(0, -1) + ', 50%)'
     const surroundingLight = ambientLight.slice(-2)
     const barrier = lightBarrier.value
-    // make light columns wider to illuminate surrounding blocks
-    const extra = Math.floor(B / 2)
 
     ctx.fillStyle = ambientLight
     for (let col = 0; col < W / B; col++) {
@@ -75,8 +72,11 @@ export default function useLightMap(
       ctx.fillRect(sx, sy, sw, sh)
     }
 
+    // make light columns wider to illuminate surrounding blocks
+    const extra = Math.floor(B / 2)
+    const reflectedLight = ambientLight.slice(0, -1) + ', 50%)'
     ctx.fillStyle = reflectedLight
-    for (let col = 0; col < W / B; col+=2) {
+    for (let col = 0; col < W / B; col++) {
       const level = (barrier[col] - y.value) * B
       const sw = B
       const sh = level