I think the base idea of punishing the player on missed shots is cool (and also really suits the theme of the jam!), but the movement is way too fast (i'm always getting into ennemies), and the bullets do so little damage, to the point that a single miss can quickly be a problem: a miss => more ennemies => more shooting => more misses => more ennemies => death x). It snowballs very fast!
I think it may be worth it to elaborate on the concept, with more polishing it could be fun!