How do I make a 3D mesh turn around (left or right) using a 2D axis? PLEASE help! 
This is probably a terrible method- but I just uh keyframed it to turn. And it would keep moving on it’s local 2d axis.
ive uploaded a blend of a 2d platform game i threw together for you, its got a score system, working rotating character, enemeys, and menu, feel free to use it as a reference for your game, if you need help with anything at all, please dont hesitate to PM me 
hope this helps to kickstart your game development! Download Link: http://www.mediafire.com/?6uo3i60dcgqkwp8