Very impressive entry! Shout out to the whole team! This was a funny Metal Slug-like game, and the fact that it has actual cutscenes is really impressive. Needless to say, the art is incredibly clean and beautiful. With artwork of this quality, I believe you could land an artist role at any indie studio. The animations were amazing as well. Having multiple enemies with multiple clean animations is seriously impressive. I enjoyed the game from start to finish.
I do have a few suggestions that I think could enhance the experience even further. First, the game lacks background music during the stages. Adding one or more tracks would enhance the atmosphere significantly. Second, the game could benefit from more feedback effects. For example, adding effects when the player or enemies get hit would greatly improve the game feel. Since you're using Unity, I'd suggest checking out Feel by More Mountains and All In 1 Sprite Shader by Seaside Studios. I used both extensively in my own game, and they're very easy to set up, extend, and customize. Third, the UI, especially the health bar, felt a bit small. For reference, I played the Windows desktop version. Finally, I found the game a bit easy. A more gradual increase in difficulty could improve the sense of progression, although I think the game already does a good job of introducing new abilities and enemies with each stage.
That said, this is still an incredible entry. The presentation, art, animation, and overall polish are outstanding, and it's clear that a lot of care went into making it. Great work!