Nice game, it was kinda a sudden when you switched dimensions and i could tell the game was kind of a roguelike since it had buffs and such.
Though i felt the art style change was a bit weird maybe you guys were trying to enforce the fact that this is a different dimension but i think the artsyle should have been consistent
Also the combat was a bit boring since all you were doing was just running around and shooting the monsters and the sudden boss battle with all the projectiles caught me off guard, maybe during the buff collecting phase you could have added enemies with different attack patterns(e.g. a shooting enemy and a rolling enemy just to prepare you for the boss) and i think you should have made it so the little buff coins float towards you when the player is nearby instead of having to be exactly where the coin is.
Anyways good job with the game!