The boss is fun,fast paced and just the right amount of difficult.The music does a really good job of hyping up the fight.The particle effects for the dodges and fire is unexpectedly quite good.
UI is responsive.Nice job at color theory the player character and the enemy nicely stand out
The only nitpicks that I have is that the enemy attack windup in some attacks is a bit too short so it's hard to react to the attacks.
All in all,awesome game.Had fun playing it.Reminded me of a another great indie game Furi.