Excellent! Very intuitive and the level design is absolute peak, very well made and I love how the levels are structured to slowly introduce more concepts. Just when I thought it couldn't surely get better, the black/white block swapping was introduced which added a lovely twist at just the right time :D Love the interpretation of big too bwhaha.
It is sadly possible to get stuck like this though, possible to escape but very difficult and it makes a super loud sound repeatedly when this happens. You get stuck between the line and the black/white changing blocks. Overall, love it!