Really cool game ! Honestly one of the best I've played during the jam (and I played a lot of'em).
DO make a full game out of it and tell me when it's ready haha ! But just one little thing that I have to say (except from OH GOD IT'S HARD AS HELL) is that you can hide yourself in one of the two corners and the ennemies won't be able to touch when they spawn, so you have a lot of time to shoot them before they come back (don't know if it was a bug or not because the game is still hard with it though).