Arrow Keys/WASD/Space to move and jump
Z to place a checkpoint
P to Pause
R to Restart
Any issues with the game on first play, reset your data to make sure, and let me know what the problem was so that I can try to fix it.
Unfortunately, a completely unintentional but unfixable side-effect of me adding updates to the game is that you will lose your save progress, if you get fed up with trying to beat the same packs over and over again, there is always the level editor!