This was fun! Reminded me a lot of Celeste. Actually it was the only reason I could get past that initial spike area, as I remembered you can dash through starry field blocks. Maybe should have covered that in the tutorial ;) oh and the tutorial claims you hold B to climb right and such.. but I think you meant D.
I was a little disappointed there weren't more fruits to collect in the later rooms, and likewise that you get sent all the way back to the start instead of having checkpoints when you reach a new room. The upscaling on the clouds and background mountains looks pretty bad due to the obvious oversized pixels, but I assume that was due to lack of time. Those minor issues aside, I enjoyed the game. Good job!