Hey, nice game!
Its fun to play, and the music really fits the fast paced gameplay! I loved that the quick enemy spawn rate at the start makes you feel like you're being overrun by a zombie horde, but once you get enough upgrades you feel really powerful when you can finally deal with them all! My main critique is that the music doesn't loop, so after a few minuities you're left with only the sound of bullets. But in godot that's an easy fix.
Overall this is a really solid game, and despite the short deadline, the game feels really complete. If you have the time, come and check out ours too!