Great start and pause menu. A lot of types of enemies. Really liked the life on the top of the enemies, it was a nice touch. Scare me to death when I caught a small heart. I would try to zoom in a little bit, the view is to big, specially with the parallax background, turns it in a dizzy effect. Could not dash, maybe a bug or something on my side.
But you have a lot of work already. Good work.