Nice concept and visuals look good too! Maybe add some time/ move constraints. I tended to simply dodge enemies until an opening for attacking presented itself. Also, the camera movement gave me a bit of a headache.
I think the GMTK-Jam has an ongoing joke about everyone doing "shoot to move" whatever the theme is, but you found a creative new way, that I haven't seen before. I could totally see this being streamer friendly hit on steam!
The reloading mechanic doesn't add much to the gameplay, and maybe you can look into creating more loops in the level design, so if the player fails a jump, he only drops to an early level.
The controls for gliding and charging the jump feel a bit weird, but I get that you were going for a Jump King type of game. Also, I don't find it very clear what is part of the background and what is a platform. The style is cute and overall the game has appeal, while, in my opinion, being way too difficult for a jam game. This way, most reviewers will only see a fraction of what you have made.
Great concept and execution. More variety of platforms would be good. I didn't get the purpose of the red barrels, their explosions didn't really affect anything, but having more object with gravity could be fun.
