Great work on the graphics and effects. I had some trouble learning how to use my upgrades but probably a skill issue on my part. Congrats on making a cool game!

A survivors-like squeezed onto one line is such a fun idea, and enemies flying off screen when they die is really satisfying. The little arrows for whoever is coming from off screen help a lot too. The XP gems seemed to stay where they dropped, so I wasn't sure if I should walk over to grab them or keep turning to shoot. A small pickup magnet might help early on.

played this longer then i expected, nice work on the build up.