this game was really fun, but the problems are:
1)the lives just make it harder than it should be
2)if the cube has passed the end of the level it won't spawn anymore, this means that if you are in the level where the cube has to stay on the big button you are softlocked and have to restart the whole game.
3)the game can easily break leading to some weird stuff and even softlocks where pressing the R button does nothing...