This is fantastic! Incredible that this was made in 48 hours, I loved playing this. A few notes from what I played:
-Mostly free of bugs, however once starting put me in an entirely dark green room and could not exit, and one room the exit didn't show up.
-rolling a new gun can give you the same gun you already have, which isn't great.
-The number you get at the end of a run isn't clear what it means.
-The number shown on the dice projectile does not indicate how much damage you will deal, which is mildly disappointing, although expected from the time constraint.
These are the thing I noticed while playing, and I hope you can use this to better improve your game.