Very underrated game. I need more attempts!
It gets tricky once you reach level 5; at the point, the green-and-black finished qubes have the colors reappear when you land on them. What makes this more difficult to me than Q*Bert is the fact that you only need to land on them in Q*Bert; in this game, you need to flip them into the right directions to get each color to appear on the side where it belongs. That gets difficult for the ones at the edges near the hole because sometimes you get those correct, only to land on an already-finished square that you need to do all over again while evading everything.
Going to give the game another try myself today.