I think this could help you: http://higherorderfun.com/blog/2012/05/20/the-guide-to-implementing-2d-platformers/ http://higherorderfun.com/blog/2012/05/20/the-g

I think this could help you: http://higherorderfun.com/blog/2012/05/20/the-guide-to-implementing-2d-platformers/ http://higherorderfun.com/blog/2012/05/20/the-guide-to-imple...