That's an interesting combination, a runner and a platformer, it works pretty well! I'd only say that level design is too unforgiving, I fell to abyss so many times before was able to finish the first level, that was too tired to try the second one. But maybe that's just me.
Also the mechanic that you can control yourself in mid-air with attack is pretty cool, but I found out about it only after finishing the level and reading Pawel's comment, in my run I thought that that sneaky barrel coins are just traps and it's impossible to take them. Again, maybe it's just me, but I think telling the player about this not so obvious mechanic at the start of the game would be a good thing.