Seems like a very simple exploration game so far. Only played the first chapter, but there isn't any puzzle solving or anything and only very basic platforming.
The twist is that you can't see the environment until you paint it. Everything is completely white and invisible until you chuck some black paint around. Progress is naturally a bit slow as you have to map out the path ahead manually as you go, but it's a fun mechanic. You can find balloons hidden around that allow you to buy upgrades for your paint throwing, like the time freeze, which lets you fling out multiple balls of paint at once. Not seeing a huge frog that was right in front of me until I flung some paint at it was quite startling.