I like the concept, I think you could have cut down the mechanics though. Collecting dice, collecting numbers, collecting elemental numbers, getting a double jump... there's a lot for such a short game, and not all of the mechanics are very useful.
Enemies are annoying to deal with, especially the boss which never stayed on the ground long enough to attack. With how random rolls are, your only option is to just spam dice and hope it works. The music also glitched after beating the boss, and there was one section where I couldn't pass with my double jump (right after the first water enemy).
I really love the moody atmosphere of the game!