I love the art and I can definetely say that you are talented :D I liked that you added a story, since not many people would have taken the time to do so in such short time. I very much like the dash mechanic, but I would maybe try to make another form of attack as the dash kind of takes control away from the player. (Maybe a melee attack?) The dash might be a bit to powerful since it can basically be spammed in air at all times. So maybe increase the cooldown. I would also add some more game juice, since I didn't feel very satisfyed when killing enemies. Maybe try making the particles a little more visible. Overall for a game jam this is insane, I really like your game, good job!
PS: I hope you continue working on this game since I think it has massive potential :)