You've got a decent menu with a volume slider (first one I've seen in this jam), particle effects on the sort, slow-mo attacks into mouse direction, light effects on projectiles and a complex collision detection. That's a lot of trickery.
The art of the characters and title screen is good (background not so much but ok) and you get to the action fast. This is also better than in most of the 50+ games i tried.
The technical difficulties (I think you have some kind of memory leak after dying) are annoying but for a short minute playthrough not blocking.
Great entry.