Is level 13 broken? The time reverse effect seems to persist even after the link to it is disconnected.
Otherwise, this is a very solid puzzle game! The Baba Is You vibes are obvious but the mechanics are definitely distinct, and there are definitely some clever uses for the mechanics (like level 11).
Viewing post in A Step In Time jam comments
Push the time block one tile to the right, then keep pushing it upwards. The water(?) and the green guy will continue moving in reverse even after the time block disconnects from the vertical movement block.
I'm on the browser version, if that helps.
That very well may not be part of a valid solution, but it does seem like a bug.