Really nice visually stunning game. It really displays the theme of the Jam. I have some suggestions:
1> When the player falls below the platform it keeps on falling infinitely. You should restart at a certain minY value. (if there is a limit, i had to wait to long and had to restart the game form the menu).
2> To make it more interesting and little easy for players, you can slow down time when rotating the player cube. From this players will have some time to think.
Overall nicely done. :)