Nicely done ! We had a fun livestream with my viewers on this game.
Menu is cool looking, as is the main character. Lighting effects during the night are convincing.
Combat might require a bit of balancing, because enemies are slighty too fast, but lots of medipacks on the way make up for it... Sound design is good !
If you made this in 30 days, can't imagine any limit to what you can achieve with more time at your disposal. If you ever make a 8h game, I'll gladly buy it !