I'll repeat what everyone else said about this one and say that the game needs a little bit more feedback - a health bar and some kind of indication you got hit would do wonders. 

Aside from that, I definitely enjoyed my time with this one. Basic top-down-shooting fun, and this leaves me wanting more in a good way.

The readme says that the boxes unlock different weapons, but I didn't seem to get any. I played for about 15 waves; do the weapons unlock later or something? A small thing is that the enemies spawn randomly on the screen which means I can't prepare for the next round and might get hit immediately as it starts. I'd like to see the enemies come from either the sides of the screen or some point like a spawner or something. Overall, nice job!

Nice one! It would be nice to have a little more Juice/feeback in the game, but it was fun voerall :)

Plays really well! One thing I feel it needs is a visible health bar, however