The game was very fun i love how everything don't follow an exact loop because your future self can alter the past self and create "exploit" like flying etc..
I think better movement can be the next step. And maybe a tool to help the player to plan ? Or a better collision design. Like somethimes i wanted to jump on the head of the past me, but couldn't because of physics. Maybe something more clear.
But i finished the game and have a lot of fun