I had fun once I got the hang of it. The attacking was kind of hit-or-miss for me, though, so I ended up just running and jumping past most enemies. The end boss was well designed and took me a few tries to beat. Reminded me very much of NES days. Overall, a solid effort for a prototype.
If you ever expand on this, it could be worthwhile to ease the player into all of the different moves (I only discovered that there was a dash move by reading the comments here). I'd also love to see a bit more variety in terms of obstacles and enemies, as well as a visual hint of how many hits an enemy had taken or needs to go down (e.g. show an enemy taking damage).
Music was fitting, as expected!