Pretty awesome.  Only initial critic would be to see the player start with 2 dashes instead of one.  It makes for a frustrating time when you get hit and dash at a very close interval.

Very well made. It's fun, it's simple, it has a really nice aesthetic. Being stuck with one dash seems unfortunate though, a way to build up dashes more seems like it would help (a special enemy that gives you double?). Overall very fun though.