Nice rewind mechanic! Liked the game, - I also found the rewind cube to be a little buggy every now and then, where it wouldn't go all the way back, but generally really like the game! Check out my game too if you get a chance. Cheers!
I made the rewind cube to go back at a fixed time that is 5 seconds. So, at the end of the 5th second, it might be that the cube may be upright with just the edge touching the ground. I have turned off the physics, so gravity is not much of a factor for the rewind cube.
