This is a cool concept that had me curious right away, but it's difficult. At times I had a bit of a difficult time understanding what I was trying to do, making it quite trial and error. That meant lots of hopping back and forth, not fully grasping what I was doing wrong, because I wasn't totally positive on how to move forward. It felt like it required very precise timing. I think it's also just fairly difficult to think backwards for a longer period of time, but that could very well just be me. So it's an interesting mechanic for puzzles for sure, but it went a little hardcore on the difficulty too soon :) Imo it really is fine to just start with the most basic imaginable puzzles, simply to let the player get the hang of the mechanics.