Wow, this is a nice entry! I was impressed by the character/enemy design and the animations. They have so much character! The controls felt pretty good, too! The boss fight was simple but quite good and satisfying! It's not the most polished entry I've seen, but it was still quite enjoyable. I think that if you had been able to put more effort into the level design, things like music and sound, and increased the length, it would have been a contender. There's a lot of potential here.

FYI next time you do one of these jams do whatever you can to get a web build made. You'll get much more people playing your game that way. 

Keep up the good work!

First of all, I just want to say, congratulations on finishing your first game! For someone who's new to gamejams and probably even game development as a whole, you actually made a pretty enjoyable game. Some of my favorite things from it were the particles when bullets collide and/or something dies, the Celeste-like dash aswell as the cool boss fight at the end. 

A few quick suggestions of mine are, when the player takes damage and flashes, make the color the player flashes a bit darker or lighter because, when you get hurt, your character starts to blend in with the background and when you deal damage to an enemy, have the enemy flash red just like the player to show that you are actually doing damage because, currently its feels as if enemies are taking no damage at all from my projectiles.

This was a short but fun game to play that I would totally recommend other people to try and I hope to see more games from this creator in the future.

Congratulations on finishing your first game! That's something you can be proud of.

I like the art style, even though the environment could have gotten a little love. What you definitely should include in your next game are sfx and music.
Also, you should probably not change the resolution of the game in the middle of it.

I liked the boss design, even though it only had one attack. 

Keep up the good work!