Alright, I'm going to try to give you some in-depth CC on this because, honestly, your acrobatics is really the only thing holding you back (aside from the one with the penis which was pretty good).
Okay first of all, on the jump before the first flip, his spacing increases a lot and then pretty much stops. You should really keep the spacing the same throughout the jump, and most of the landing until he blocks. The way he blocks tells you how you should move the stick-man vertically and horizontally. Based on the block the spacing of the flip is pretty good, but because of the buildup that I just described it looks rather choppy and beginner grade.
Next you have the gainer. Executed rather well, I dont know if there was really enough power shown to justify that far of a jump, but that could be debated. The main problem of that flip is that you gave it too many frames at the tail end of it, making it look floaty. And it also makes the next move look just as weak.
Thirdly, you animated a back-handspring. Because of such a slow start because of the gainer that had come before it. Also even if you are spinning backwards, your momentum out of a gainer is still forwards. Which means that if would be really hard to build up that much power to make your handspring that lengthy. (Not to mention, really nobody does a handspring like that anyways).
Finally, the back flip. Poses were fine for the most part but the take off looked not as good. The feet should follow a giant circle motion path around the flip, for at least the first half. The way that it was animated made it look like it was going to be an omega. I know its weird to think about but unless you're kicking your legs out back and forth at the very beginning, they don't go in the direction the stick-figure is going until hes at least half way up. You could probably be fine with just taking that one frame out right after the jump, and making some minor modifications. E: This pretty much what Cressel said
Oh and that reaction to the landing is kinda weird considering everything he just did, and his landing position (which was pretty good). I doubt that someone who was able to pull that off wasn't able to properly land and back flip that wasn't over or under rotated. Not to mention what Stickly said about the poses being a little weird, and not well eased.
