Nice aesthetic, although you could've gone further with it. The movement mechanics were pretty good, but I was disappointed that the environment gave me absolutely no reason whatsoever to use them. The most I did was double jump to reach the high platforms. But even that was pointless, because you could have just made the platforms short enough to reach with one jump and it would have been exactly the same.
This game is supposed to be about speed and momentum, so why is the best strategy to hide behind cover and only come out to shoot briefly? You should have made the enemies always aim a little behind you when you're running, because I found when I ran around I would always just get hit anyways. Speaking of enemies, they were extremely boring, but I know it's hard to make good enemies in game jams.
I believe the guns shoot a little to the right from where you're actually aiming, which is a huge nono. That makes it basically impossible to aim correctly. Also, imo the bullet drop was way too strong. Sure, it's unique, but unique does not mean good. Just because a mechanic is unique doesn't mean you should keep it. That's one thing playtesting helps a lot with. I found myself adding stuff that, when playtesting, everyone told me was annoying. I just couldn't see it because I was stuck thinking "oh, this mechanic is kind of interesting" instead of "oh, this mechanic isn't fun".
So yeah. That's all I have to say.