Great concept!
The visuals are okay, but making the "past and future" versions of the level overlapping and semi transparent can make things a bit confusing and oversaturated. I'm not sure how to help it, maybe putting only the silhouette of the past, making the future semi transparent, showing only the mearest past and future, and distantiate them a bit more...?
Anyways, I liked it and I wonder how the game may be in the future...