Hey, is this your first jam AND your first game ?
Nice work on the 2D Assets and the dark mood ! <3
Special mention to your music choice too.
Next time, maybe focus on more audio and visual feedbacks. A simple gameloop like yours is totally fine but cooler if you add VFXs, SFXs and Camera shakes, they're not complicated to implement if you planned your code's architecture before (pro tips : planning code and assets is free during the WE as long as you don't work in your engine, use it as much as you can !).