This is good stuff - the combat mechanics are tough, but also extremely satisfying when you finally get the hang of them. Comboing enemies is extremely fun!!!
Gameplay-wise, this is, like, Devil Daggers levels of quality in combat design.
One suggestion: I think it would be good if there was a couple of frames of some sort of 'grace period' after the dash has ended, during the transition from dash to neutral state, when you are still invulnerable and can kill enemies, so you wouldn't have to be as precise in managing your dash meter as you currently need to be.
Overall, great job!