Thanks for the awesome review! Timeboxing ourselves to 4 hours (3 hours of development + 1 hour of polish) proved to be a big challenge. It forced us to skim the design again and again to respect our self-imposed 4 hour limit. In fact, the randomization of the placement of the black cube was next on our todo list. Other fun fact: The monster going through walls was a bug that we decided would not be fixed as it made the game scarier.
Thanks again for your review, and for playing our game. I haven't made it past 5 points yet, but I think it might be doable.