Not too shabby! It definitely throws you in the deep end right from the start with no direction which can be a little frustrating, but eventually I came to grips with the system and had a good time! Overall the game seems well put-together and solid for a jam game: the gameplay is fun, hectic and juicy and there's an interesting strategy in both where your space bar serves as a weapon change and a dodge mechanic at the same time and where you must manage your weapons and perks to handle whatever comes up.
The only complaints I have is that, while it is fun, it's quite short and doesn't take long for it to feel rather shallow, unbalanced and unfinished (which is quite understandable for a jam, of course). I found it odd that the game doesn't slowly introduce more elite enemies into the spawns as waves go on, but rather just puts them in randomly, which makes it so sometimes you get elite enemies right at the start before you find your footing, or you get boring melee waves later on that are too easy with your now advanced arsenal. Gameplay could feel unbalanced where sometimes you just get stuck plinking away with incredibly weak feeling guns at spongy enemies. And of course, I wasn't sure if there was any sort of goal, story, or high score to strive for.
Definitely a pretty short and sweet game, and could be an effective prototype if this is built upon!