The game looks and sounds awesome!
It has some really good platforming potential, but i feel the projectile is not in full agreement with the rest of the game, if not for the barriers and the final boss fight, i feel like the game would be better without it.
If i had to time my jumps to avoid all enemies, instead of being able to kill them, the game would feel even more interesting as a platformer, and the pacing would be more fluid.
At times i felt a bit bored from trying to jump and shoot at enemies, as it feels a bit slow and the enemies dont react much to the player.
Maybe it would feel more fluid if the player didnt stop mid-air while shooting and if the game demanded more scenarios of shooting while platforming, that way moving around at fast speed while shooting would feel more exciting!
All in all amazing work!