I know it's been mentioned below, but definitely want to make sure you move the "how to climb" tutorial / info to the first screen where you need to climb for the first time, since it's not completely intuitive. I definitely got stuck there for far longer than I'd like to admit. xD
But, once I figured that out, I found the simple color palette to be very pleasing and the gameplay equally satisfying -- I just with there was more! I wish you the best as you keep expanding on this one. :)