I couldn't figure out dash/attack mechanics, when I press space it would take a moment to animate, then I realised it activates when I move, then I killed all those creatures and then it went all red, I realised the game very late... I would recommend a tutorial of some kind to let player understand the game, also music would be a lot useful in this case. Mechanics are quite likable as it has platformer mechanics with dash (which I love the most).
Over all a very nice game you got here, perhaps improve on these points and you may have a great game...
PS I need to mention the graphics are beautiful but the fore grass doesn't go with all pixel art style you going in rest of the game :) cheers