I'm glad you liked the rewind, and I think it's really cool we had similar ideas! As for how I made it, there is a script that has a timer for how often we want the frames to be recorded attached to it. Every time the timer goes off, the script records the current place of the player until the allotted time for the player to run around runs out. Then it just plays back the locations backwards with tweens between them so you aren't teleporting everywhere.