Love the switching world switching mechanic and it is implemented very well here. Not too hard and pretty straight forward so far, would be interesting to see more difficult levels. The only thing that made the current levels difficult was a bug that caused some platforms not to stay after switching to the other player while I definitely had a player on it.
The squishy jump animation is really good and together with the sound it makes the little blocks actually pretty cute hahaha
Really nice work on the aesthetics as well, good game!