I loved the controls of the character! You really nailed the combination of double jump / dash. It feels fast, and in control. You certainly could reuse the moveset for other projects.
The UI design is a nice touch, really retro style, loved it!
I didn't understand what to do at first, I only thought I had to move through the level. I feel that the moveset of the character fits better a speedrun kind of game, than a kill them all gameplay.
Good job!