I'll second what Haydoggo said, it's very elegant that it naturally gets harder to avoid hazards as you grow bigger. And despite being a simple game, there's enough variety with the different rain depths and multiple types of threats and changing player shape to keep it engaging.
I was silly and did at first think my goal was to feed the boars, and wasted a couple of mushrooms on that 😔 but I got it in the end.
My one gripe about the controls is I found myself wishing you could hold down a key instead of repeatedly tapping it in those moments when you want to quickly get from one side to the other, but that's a fairly minor thing.