Very cool motion shooter with amazing potential. The concept of having different guns, counters and abilities is a great spin on the shooter genre in general, and I think the game has a great understanding of mechanics that make shooting and moving fun.
I LOVE that a lot of combos and strategies can be learned intuitively by the player, like learning that you can counter the red turrets with the red gun to easily avoid damage, or that you can combo the green guns ability to jump into green enemies and counter for a ton of health back, or that the yellow gun is particularly good at dealing with tanky blue enemies because of the damage increase with successive attacks.
Some sound and potentially particle effects would go a long way to making attacks feel more impactful and have more weight (both for you and the enemies). I think the gun sound effects could be turned up just a little, especially for the blue gun.
Also this is just a personal preference, but I wish the green power also let you double jump. I think making the powers stronger would help them stand out more but those are just my thoughts and I'll stop backseat deving now.
Overall I really like this game jam project and can totally see it being turned into a full experience, I think it has a great foundation for concepts that can be taken even further, if that's what you wish.