I liked everything about it, the music, sounds, art, mechanics, everything. Specially how you load your weapon and how you start the game. The ending was also great.
It would have been great if you also had a 'score, a 'survived time 'or something like that to make the player feel rewarded and motivate them a bit more to keep going. But even without that, it was still fun to play.
It is also one of my favourite games of this game jam.