Very interesting idea. I like the concept but I gave up in level 3... Maybe I'm just not patient enough for such a retry heavy game. It's like you know what to do but it's hard and annoying to perform with the slow movement, enemies destroying you or someone destroying boxes that you need. Faster movement would make it easier for everyone to dodge bullets unless bullets are also faster. Maybe an optional 2x game speed mode? The third level looked really long... Maybe destroyed enemies could drop health or upgrades so that you can heal and have an advantage over the enemies.