Nice work! Really fantastic graphics and atmosphere (good sound!) No idea how much of those you actually made but definitely put to good use. You definitely have talent, this was really nice for a jam game.
Just a heads up (this doesn't actually make a difference in figuring out the code), but your mathematical expression in note III is wrong ( you have 6 + 6 * 0 = 0 but it would be 6 unless its (6 + 6) * 0) Sorry I'm such a pedant, ignore me, cool game!