This is a really cool concept for a limbo-like platformer. My only suggestion would be to add some sort of indication of which way in time will produce what result. I didn't really understand how moving forward or backward in time would make giant pillars emerge or disappear. You managed to create a beautiful atmosphere and engaging puzzles. Kudos!
Viewing post in MONS jam comments
This isn't moving through time; rather, you shift and rewind through space. The pillars and platforms that shift are all cross sections of 3d objects, and the player uses these cross sections as platforms. This is also why when shifting, the intersection of the object glows and illuminates the rest of the object in 3d.