For a prototype of an engine, it's a good start. The controls themselves are solid and I liked how the camera worked. The animation sequences are really good, although the initial punches feel a bit slow. The models look nice, a bit like toys, but I can see a whole game made in that style and enjoy it. But definitely more works is needed.
As I was running around as a clone of Chas, I had small issue - after first hit, he got stuck in a damage animation and couldn't do any attacks. So I was sweeping through the rest of the level in semi T-pose. Entering a new area reset the animation.