Pretty interesting idea whose story I'd like to know(if there is any lore to the game).
Very nice drawing and animation of objects. Pretty simple but well working gameplay.
The feeling of a limited amount of resources with each killed monster becomes something or a little less because of the fact that to kill you need 1/4 of the bullets that you are given when killing a monster.
Lacks some kind of indicator that would indicate that I hit the enemy. Movement after the first minute begins to lose meaning because in fact you can just stand at the heart. It would also be cool to add some thematic soundtrack like a sound track or sounds (I realize that to do everything at a good level is hard, and because of the time constraints have to sacrifice something, I have so).
All in all a good game that I would like to learn both the lore and what it would turn into if you had more time!