Really fun! Also extremely difficult. I participated with a team in the 20 games challenge this past summer and never got a chance to play this one.
I would honestly be curious if this plays better if the Dash mechanic were controlled with the same button as jump (C). In theory it's just a special kind of double jump and having it as a separate button might impose some extra mechanical friction that might not be part of the "fun" of the game by having to switch to a different button.
Something to think about.