Interesting concept ! The theme is a bit far-fetched : there is no rolling dice, you took the freedom to go more in a "slot machine" direction, which keeps the randomness element and the "rolling", I guess, so it's not completely off-theme either ^^.
I enjoyed the game enough to go to the end ! The idea is really cool, the graphics are great and the music fits perfectly the ambiance. I would have enjoyed if weapons played really differently (like a short-range projectile, a hitscan and a bouncy one, for exemple) so every roll would need to re-think the situation, but that's a lot to ask for a 50h game jam =).
Good idea, great execution, congrats =) !