Playing this game initially, I had a feeling of "I don't know what I'm doing, and when I do know what I'm doing, I can't do it." The "I don't know what I'm doing" factor came from not thinking I had any kind of idea what the level looked like or where the other signs were. Up until I read the reviews, I thought that the arrow by the player character indicated where I would go if I dashed, rather than where the closest sign was. The "I can't do it" factor came from the difficulty curve of the level, as very soon in the level, the game requires complex movement combinations such as running jump + dash + a lot of wall jumping in order to proceed.
After pausing the game to look through the reviews and take a breather, I went back to playing. Now that I'd gotten the hang of how the game worked, including the arrow, it was easier to figure out how to complete the objectives. Hence, it wasn't as much a matter of the levels being difficult as it was the game leaving me in the dark about most of how it worked, leaving me to flounder a lot. (Although I agree with @DyrusDB, wall jump does need to be more powerful.)
I'm leaving this here for players who need help: One thing that the game doesn't explain and I didn't see in the reviews, that I had to find out myself, is that if you're running, you will jump higher than if you jump from standing still. This is of the utmost importance in a few places in the map, one of them being getting back on top of the ramp at the very bottom after you've gone to the right of it to repair a sign. You won't be able to jump high enough to get over the ledge unless you use a running jump.
Overall, I wish the game had less of a difficulty spike at the beginning, and spent a bit of effort showing the player how it worked before throwing them in front of a complex challenge. The graphics are really cool, although I once again agree with @DyrusDB that there needs to be more detail to give the player an idea of how far they're going. The music is cool, albeit a little annoying when the game itself is already getting frustrating. I also have a tiny nitpick - it says "rollerblade" in the description and the sprite has roller skates, but the movement doesn't feel like skating, so maybe that detail should be taken out. This is a really cool idea, and I hope to see it given a bit more development.