Pros: Great art, nice feel with the physics. The gameplay is reminiscent of Celeste or Super Meat Boy, while the dodging of squares reminds me of the World's Hardest Game back in the Flash day. Challenging and makes you want to keep improving. And using the dress to hover is very unique!
Cons: Tough game, but as someone who also made a game that's way harder than it should be, I completely understand with the time limit. If you were to make this without jam pressure, I would suggest having checkpoints slightly more frequently, and IMPORTANTLY reduce the waiting time when respawning. That would really help players get right back into it and less likely to feel frustrated. And I wish the controls were slightly more modifiable. Shift + Space is very awkward for me personally. I think for platforming games, a hack for jams would be to have multiple options for each button, like WASD / arrows to move, Space / Up to jump, Shift / J to dash. Then players can use what they want.
Anyway, great job!