I liked this game, I think it was an original take on the classic top down shooter genre. I like the idea that enemies spawn over the time you are out of the box, so it adds a bit of chaos.
I unfortunately found a pretty easy cheese in this game where I got the rocket launcher and could camp out right by the shop and just fire my gun and poke back in. I think if you made it so the player had to be fully in the box to be recognized both by the enemies and to be able to shoot, that could potentially stop that cheese.
Overall I did enjoy this game