Cute game! I am a knight enjoyer and the prince is cute. :-)
I'm a bit irritated by the movement controls though, specifically the jump button. Since you're using the WASD and mouse control scheme, and the W key has pretty much no use other than deciding your dash direction, I feel it would've been better to map W to jump and make the player's dash direction dependent on mouse direction. Alternatively, ditch the mouse, go for arrow keys as movement, Z to jump, X to dash, would be significantly more convenient. Also, the boss is a bit............ tanky, especially considering how you need to jump-dash to hit them. But I like the little prince. ;-)