Nice spin on a classic concept, always liked games like this ever since Cursor*10. The game wasn't difficult, but it could be a little frustrating at times having to run back to the time machine after failing a bunch of times. The game was pretty short though so it was fine. I think I'd prefer it if the game tracked the time the clones stood still as well, so you don't have to either keep jumping or moving in place in order to allow the player to jump on you.
Thank you for the game!