Everything is well done, most of all I liked the gameplay, but the balance of upgrades could be better, because makes sense to improve only the reloading and speed.
Oh ok, well I didnt want to make it too difficult, I feel like at least for the Game Jam its fine to be relatively cheap upgrades. Will try to balance it out more if I work on the project in the future. I would still like to add more enemy types and weapons if I have the time and motivation :)