Right, taking it from the top
1-Intro: Wasn't that gripper, bored me and I wanted to close it, make a more exciting, and gripping intro next time
2-Sync: No sync whatsoever, the first replay you had a great chance at making a sort of "explosion" with the beat
3-Game button: People have already commented on this so..yeah
4-Pause: There is a pause at the beginning of almost every replay, which is rather annoying, you could've just started after 10 frames
Well that's all I can think of at the moment