Hey I forgot to give your game a proper rating, even tho I played it a little while ago. Such a neat concept and the controls felt pretty tight (on controller, keyboard and mouse didnt work as well, just like you said). I liked the challenge of only getting a few seconds to be in the past to finish the levels, and it was a pretty smooth transition each time. I've really liked what you've done overall, and the tutorial messages as well were quite helpful. I will admit tho, i didnt get a chance to fully finish it, but I still enoyed my time with it.
I think it could be interesting if you had to do puzzles or maybe move blocks around in the past in order to be able to traverse the platforms in the future, like a cause and effect kinda thing. There's lots you could do with what you have.
Overall, nicely done. Keep up the great work.