Few pretty specific jumps, and the tag to fall off the rail gave me a lot of trouble. Pretty solid run in the end.
Note: For those who don't know, the pausing is pretty necessary. The Sonic tag is not supposed to allow you to jump, however if you pause, then unpause you can easily while the game is paused switch from not holding A, and holding R, to holding A and not holding R and you will jump as you release the tag. This can be done in real time, but it's frame perfect, it's just way easier to use pause