Cute! I feel like the middle part was the hardest, with the braziers, because before that it's easy to keep the ricochets under control, and after that there are many health pick-ups. With how unpredictable the ricochets could be, and how the enemies weren't themselves all that dangerous, it did feel like the only winning strategy is to just not shoot that much.
If you wanted to expand on this, I wonder where you'd take it? I was thinking maybe some permanent upgrades, like a directional shield that also splits the bullets, or blocks you can place to alter the geometry, ideally in your favour. Maybe some enemies that actually put pressure on to shoot more. I suppose that goes against the game jam theme though!