I enjoyed this quite a bit! However, there are a few improvements I would suggest adding. First, having the gun you can't shoot a certain type of enemies with while those are the only enemies left alive just made the player wait for the next gun without opening up any more possibilities. Second, the waiting time for new guns overall felt far too long - maybe if you hit an enemy with the gun it skips the loading time altogether? Third, the grenade launcher often just felt useless. Other than those things, though, this was pretty polished, presented well, and fun!