Cool idea! Definitely a lot of potential for more levels. A few minor issues -- "reset skill" in the tutorial room didn't work for me, "escape bar" instead of space bar -- but the core concept is really cool.
What might be interesting is if instead of just getting all the skills at the beginning, you get them one-at-a-time in an environment that's safe to try them and reset the level quickly. Like, the first level could just be totally clear, no skills needed. Then the next has a barrier in the middle, and you learn the jump skill needed to get over it. Then there's a couple levels testing out the jump skill, learning when you need to use it and when you can save it for later. Then, you learn dash in a similar way with a pit in the middle of the level. Then a few levels testing the combined potential of a jump and a dash. Rinse and repeat for as many skills as you want.
There's definitely a lot of potential here!