A really outdated physics engine for platformers made in 1.4. I don't recommend using it, but it's still here. Use the sliders to control the game properties. Move the cube with the arrow keys, or drag it around. Press space to show/hide sliders You can use this in any project you make, just give credit to @stickfiregames Update 16/05/2014: Now supports wall jumps! Update 12/05/2014: Now supports negative gravity and ceiling jumps