Super cute game and done pretty well. For a super tight platformer, I feel the player is a bit too floaty. I think the camera should be zoomed out a bit. At least enough to show how far a jump/gap is or maybe the character shouldn't be center screen but back just a bit to give the player more forward view. I think the dash should give the player a boost regardless if they are holding a direction. With small platforms and floaty movement, you are forcing the player to hold a direction, so you are mixing precision platforming with unprecise controls. With a keyboard only game, please add a keyboard button to start the game rather than the mouse to keep player in flow. Forcing a hand to switch can take players out of the flow and some will stop playing because of that. Last thing, please add a Restart button during gameplay because if a player messes up a couple times in the beginning, most would rather Restart the run instead of having to wait the timer out or jump into spikes a few times. 

Like the art. Timer broke in full screen mode and sometimes it's scary to dash, but anyway i (as speedrunning everything enjoyer) liked playing it !