Merge pull request #7 from Johnidel/master

merging
Merge pull request #8 from Johnidel/master

cropped pics better rotation
Merge pull request #9 from Johnidel/master

pulling again
Merge pull request #10 from Johnidel/master

tri collision + response
wall tiling and background
Merge pull request #14 from cpoudel3/master

wall tiles and bg img