Very cute drawing at the end!
Premise, mechanic, and concept are all solid. My biggest points of feedback were:
A.) I didn't know there was an airdash until I read the description (oops). I do appreciate the dialogue nudge you get if you fail that jump too many times though, that was well-done.
B.) Wish there were more unique mechanics! The door switch, sun zones, and spikes felt a bit generic as a totality of mechanics.
C.) A few more frames of animation for actions like falling, jumping, and dashing would have gone a long way I feel.
D.) Being able to skip the intro would have been great (I played it in web and then switched to the windows executable).