Oooh. This plays nice. I love that this looks like a PS1 game and the 2d sprites in a 3d area. Its like doom style but better. I also love rogue like games and this is like a rogue like except for you can rebirth.
I love the idea of levelling up exponentially. Getting a damage boost, beating the game again, getting a fire rate boost, restarting, and continue. its really fun. I have on criticism though which I was really sad wasn't in the game.
I WISH that as you levelled up, the waves got larger. I wish more things spawned, different types of enemies existed, different types of ammo, etc. That would have been great. But just like a lot of other games in this jam, 5 days is brutal. Nobody can make their game as they envision at the start. Your game here, it's definitely a start. It is a lot farther than just a start. It is literally a working game that is entertaining to play. But if you were able to add more detail to the game to really increase the length a player can play it, it would be great.
I managed to get my damage up to level 11 and bullet speed very high too. This made it so I was blasting through the waves very quickly. It would have been amazing if I had more enemies to fight. I also think that my health was too high, or the enemies didn't do enough damage. I was able to quickly walk away from the enemies bullets. I think that you could have a look at enemy aim predictions? If they get your movement direction and speed and fire to where you should end up would make this game a lot more challenging!
Overall, great game. Love the style. Really fun to play.