Revert "feat: add new Square and Background (#23)"

This reverts commit 6965f819be.

Assets/InGame/SpikeSkin/BaseSpike.png.meta

@@ -1,10 +1,13 @@
 fileFormatVersion: 2
-guid: 33bcba79621d3bb4db9d5aadf0370c95
+guid: 47dc11f55d08748cba8ebe3225c8310f
 TextureImporter:
   internalIDToNameTable:
   - first:
       213: -7710779685713120251
     second: BaseSpike_0
+  - first:
+      213: 978792226429369126
+    second: BaseSpike_1
   externalObjects: {}
   serializedVersion: 13
   mipmaps:
@@ -96,6 +99,19 @@ TextureImporter:
     ignorePlatformSupport: 0
     androidETC2FallbackOverride: 0
     forceMaximumCompressionQuality_BC6H_BC7: 0
+  - serializedVersion: 4
+    buildTarget: WebGL
+    maxTextureSize: 2048
+    resizeAlgorithm: 0
+    textureFormat: -1
+    textureCompression: 1
+    compressionQuality: 50
+    crunchedCompression: 0
+    allowsAlphaSplitting: 0
+    overridden: 0
+    ignorePlatformSupport: 0
+    androidETC2FallbackOverride: 0
+    forceMaximumCompressionQuality_BC6H_BC7: 0
   spriteSheet:
     serializedVersion: 2
     sprites:
@@ -103,10 +119,10 @@ TextureImporter:
       name: BaseSpike_0
       rect:
         serializedVersion: 2
-        x: 0
-        y: 0
-        width: 397
-        height: 401
+        x: 47
+        y: 1066
+        width: 100
+        height: 214
       alignment: 0
       pivot: {x: 0, y: 0}
       border: {x: 0, y: 0, z: 0, w: 0}
@@ -121,6 +137,28 @@ TextureImporter:
       indices: 
       edges: []
       weights: []
+    - serializedVersion: 2
+      name: BaseSpike_1
+      rect:
+        serializedVersion: 2
+        x: 232
+        y: 228
+        width: 839
+        height: 962
+      alignment: 0
+      pivot: {x: 0, y: 0}
+      border: {x: 0, y: 0, z: 0, w: 0}
+      customData: 
+      outline: []
+      physicsShape: []
+      tessellationDetail: -1
+      bones: []
+      spriteID: 62b7c35185e559d00800000000000000
+      internalID: 978792226429369126
+      vertices: []
+      indices: 
+      edges: []
+      weights: []
     outline: []
     customData: 
     physicsShape: []