Tessallation is a First Person, “Single Player Co-Op,” Puzzle game about a 4th grade girl named Tessa that has the whimsical ability to time travel!
This review may contain spoilers
There is a very frustrating bug: a delay between the clones' reaction (too quick) and the environments changes like the movements of the platforms, makes it almost impossible to pass the 3rd or 4th puzzle. I, personally, gave up after ten attempts.