The gimmick of going back in time to fix things before they go wrong is pretty good, even though its tedious figuring things out, it was well executed.
(I found a bug..., you can get negative warps, its still good regardless)
let me guess its when using the replay when you run out of time right? i put that in last minute. I had tested the clicking of the portal to go back in time and i did stop at 0.