Well im sorry to persist with the same argument (not just to be assy), but from same editor there is dd2, its a beat'em'up, and its ~2x slower.
http://tasvideos.org/1433M.html
Kaze is likely the fastest (movements i mean here) pce beat'em'up ive came across from naxat, so far.
Now if you forcably want to compare a car with a balloon, yes the balloon can fly higher than a car, thats sure.
About increasing speed in the game, im not sure how it would have be any good in real time, at all, its not like you run for hours to reach next ennemys or boss, its very small running involved, so i have hard to see how it would make it more enjoyable (and yeah, faster mean likely less playable).
To be more specific, unassisted you dont move around as much as the tas does, ennemys spawn and surround you, and keep respawning/coming at you, because you dont defeat them as fast as in the tas, unassisted experience (for me) was more static.
If i had to enhance the game, i would remove parry system totaly, increase ennemy number x5 (or more if possible, kinda like ninja spirit) on screen and make them as low hp as possible, lastly of course more moves for kaze.
