new sprites for heal and trap destroy powerups

Assets/Sprites/cross.png.meta

+fileFormatVersion: 2
+guid: 385eb50ca753a464eb14b00178ed7d0a
+timeCreated: 1433536914
+licenseType: Free
+TextureImporter:
+  fileIDToRecycleName: {}
+  serializedVersion: 2
+  mipmaps:
+    mipMapMode: 0
+    enableMipMap: 1
+    linearTexture: 0
+    correctGamma: 0
+    fadeOut: 0
+    borderMipMap: 0
+    mipMapFadeDistanceStart: 1
+    mipMapFadeDistanceEnd: 3
+  bumpmap:
+    convertToNormalMap: 0
+    externalNormalMap: 0
+    heightScale: .25
+    normalMapFilter: 0
+  isReadable: 0
+  grayScaleToAlpha: 0
+  generateCubemap: 0
+  cubemapConvolution: 0
+  cubemapConvolutionSteps: 8
+  cubemapConvolutionExponent: 1.5
+  seamlessCubemap: 0
+  textureFormat: -1
+  maxTextureSize: 2048
+  textureSettings:
+    filterMode: -1
+    aniso: 16
+    mipBias: -1
+    wrapMode: 1
+  nPOTScale: 0
+  lightmap: 0
+  rGBM: 0
+  compressionQuality: 50
+  spriteMode: 1
+  spriteExtrude: 1
+  spriteMeshType: 1
+  alignment: 0
+  spritePivot: {x: .5, y: .5}
+  spriteBorder: {x: 0, y: 0, z: 0, w: 0}
+  spritePixelsToUnits: 900
+  alphaIsTransparency: 1
+  textureType: 8
+  buildTargetSettings: []
+  spriteSheet:
+    sprites: []
+  spritePackingTag: 
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 

Assets/Sprites/plus.png.meta

+fileFormatVersion: 2
+guid: ca4e6b86e8709f54883136356e393c41
+timeCreated: 1433536328
+licenseType: Free
+TextureImporter:
+  fileIDToRecycleName: {}
+  serializedVersion: 2
+  mipmaps:
+    mipMapMode: 0
+    enableMipMap: 1
+    linearTexture: 0
+    correctGamma: 0
+    fadeOut: 0
+    borderMipMap: 0
+    mipMapFadeDistanceStart: 1
+    mipMapFadeDistanceEnd: 3
+  bumpmap:
+    convertToNormalMap: 0
+    externalNormalMap: 0
+    heightScale: .25
+    normalMapFilter: 0
+  isReadable: 0
+  grayScaleToAlpha: 0
+  generateCubemap: 0
+  cubemapConvolution: 0
+  cubemapConvolutionSteps: 8
+  cubemapConvolutionExponent: 1.5
+  seamlessCubemap: 0
+  textureFormat: -1
+  maxTextureSize: 2048
+  textureSettings:
+    filterMode: -1
+    aniso: 16
+    mipBias: -1
+    wrapMode: 1
+  nPOTScale: 0
+  lightmap: 0
+  rGBM: 0
+  compressionQuality: 50
+  spriteMode: 1
+  spriteExtrude: 1
+  spriteMeshType: 1
+  alignment: 0
+  spritePivot: {x: .5, y: .5}
+  spriteBorder: {x: 0, y: 0, z: 0, w: 0}
+  spritePixelsToUnits: 900
+  alphaIsTransparency: 1
+  textureType: 8
+  buildTargetSettings: []
+  spriteSheet:
+    sprites: []
+  spritePackingTag: 
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: