had to peek at the walkthrough twice(lvl 1 and 3) but eventually i did it!
theres some pretty clever design here and when you get the hang of it its really fun
the rewinding background also looks great!

physics base movement is always a big challenge in unity and the general movement could have used some tweaking for sure. combined with the high difficulty dodgy movement can be pretty frustrating. thankfully the checkpoints are very forgiving

good job overall!

Hi, good game design! I like the fact that you remember the last platform the player fell off and restart from there. Though if you fall down on another platform.. yeah, it has a certain "getting over it" feel, which can be a good thing :D 
The movement controls are pretty slippery (which might have been intentional?); it makes it pretty hard to get past the first part, getting the grappling hook. 

The game looks good visually, but the controls take a bit to get use to.