This is so cool. I did find a little issue but it's pretty rare. When I jump alongside platforms, sometimes my playerbox gets stuck on the side of it. I'm not sure where that could be coming from but I thought I'd share.
I know this problem, i think this is caused by the collision detection of polygon selection.
Click to the cube to see the polygon for collision ,i will look that , the other solution is to
place invisible rectangle block over cubes.
Thank you for this report ..
** ok i have just tested this , the solution is like above place invisible block over each cubes. This will
increase objects number in screen but not really affect speed performance , you can make over 200 cubes+
200 invisible block without lost frame rate..