I really like the low res pixel art, and the gameplay is solid too! The music and sounds are juicy too. The level design is great, the last levels with the cold industrial look make me feel like I'm in a more dangerous place, after swinging around in the lush forests.
The only thing I could give as a constructive criticism are the fences. In the first level I was confused for a 2-3 minutes as to where to go. Then I realized, that I can jump on those brown fences. It didn't look like something I can jump on, for me at least. Maybe you could introduce the player to that by placing a banana on the first fence.
All in all, amazing game :)
PS: I'm not sure how it fits the theme "less is more".