Very neat! With more work on the sprite and the mechanic (like a perfect parry system that could send back projectile, some strafing dodge or more capacities in general) you could have a really fun and cool game. For a gamejam with a short time you did well!
The level design especially was pretty good, I thought it would get stale pretty quick but each level having its own little gimmick was nice to keep me going until the end.