Very cool little game! I like the music a lot, especially the Big Peepers' theme.
Will say though, the controls ended up a bit frustrating - I kept accidentally dashing into stuff when trying to go diagonally because I let go of a movement button a fraction before the dash button and Space Ninja snapped back into side position instantly. Could I have solved this by not letting go of the movement buttons ever? Yeah, but if you gotta do multiple quick dashes for platforming purposes, then holding them down until you're well and truly sure you've dashed is a good way to not redirect in time. So, weird as it sounds, it feels like the controls were a little too responsive.