feat: add new Square and Background (#23)

Assets/InGame/SpikeSkin/BaseSpike.png.meta

@@ -1,13 +1,10 @@
 fileFormatVersion: 2
-guid: 47dc11f55d08748cba8ebe3225c8310f
+guid: 33bcba79621d3bb4db9d5aadf0370c95
 TextureImporter:
   internalIDToNameTable:
   - first:
       213: -7710779685713120251
     second: BaseSpike_0
-  - first:
-      213: 978792226429369126
-    second: BaseSpike_1
   externalObjects: {}
   serializedVersion: 13
   mipmaps:
@@ -99,19 +96,6 @@ 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:
@@ -119,10 +103,10 @@ TextureImporter:
       name: BaseSpike_0
       rect:
         serializedVersion: 2
-        x: 47
-        y: 1066
-        width: 100
-        height: 214
+        x: 0
+        y: 0
+        width: 397
+        height: 401
       alignment: 0
       pivot: {x: 0, y: 0}
       border: {x: 0, y: 0, z: 0, w: 0}
@@ -137,28 +121,6 @@ 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: 
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-      physicsShape: []
-      tessellationDetail: -1
-      bones: []
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-      vertices: []
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     outline: []
     customData: 
     physicsShape: []