Hey man! For that level you stand on the first crate and rewind but you need to keep the mouse on the crate while going up, the second crate u rewind towards you so u can jump on it and jump onto the platform with the door, I haven't seen this issue before but for that first craet its just stand on it and reverse up :)
Viewing post in Rate for Rate - I will give every game the time it deserves
I reloaded a third time and got a recording of some bugs such as the rewind mechanic moving my player causing the mouse to disconnect from the rewinding object, going through the object, infinite rewind etc
https://webmshare.com/yjDKW