Very nice, polished and suprisingly addicting. At start everything felt sluggish and weak, but the impact of upgrades felt great. (even though after some testing, I ended up using only miniguns :D) Also liked that you had to stay close to enemies, especially as you get upgraded, you could keep your distance better, but it encourages to take risks. Amazing job for jam game, but constant spawning of enemies made it suprisingly stressful as only pauses were to upgrade and still, enemies didn't stop spawning. Great job all in all!