Interesting core concept of time/theme hopping to fight different enemies on different maps. Obviously since this is a 3 day jam you couldn't really expand on that idea, so all the places feel identical in enemy variety and level composition.
The dice feels inconsequential to the game and are out of place with the rest of the game.
When entering a room its a bit jarring because the camera snaps into place disorienting you and the enemies start firing immediately.
I think the mana economy should be tweaked, because apart form starting staff, all the other weapons used way too much mana that i couldn't use them at all.
Really needed sound effects for the main actions done in game: moving and shooting
Clearly lot of effort into making the game and separate regions with both different visual and music for each. Good job on the game!