I really like the art style and the limited use of colour to create a nice palette that's very pleasing to the eye. Great music, too! Half the SFX are great and half don't really fit - but I assume that you'd re-do those if you move further with the project :)
I will say that I didn't know what to do for the first minute, because I wasn't taught how to climb down until a couple of screens later. I'd add a light, floating, subtle prompt when you walk to that right section :).
I hope you continue!