This is a really beautiful art style, I'm impressed! Making your powerup container also fill as stained glass when you collect them is a nice touch too. Even the dash is visually appealing! I think there's some polish could be done to the physics. Aside from janky jumping, the ground feels like ice, which I think adds a difficulty that isn't necessary.
Some potential fun you could tap into here is making it so that shooting the enemies projectiles as your only defense (alongside the dash). That could be a cool mechanic. Also using the dash ability as a way to halt and redirect yourself midair would be really cool.
Some player feedback would go along way to the enjoyment as well I think, like maybe hit flashes or sfx when something is struck. The healthbar being a bit more prominent would be nice too.
Overall good work, I think this has a lot of potential!