I wouldn't call this a Gunstar clone at all, I didn't even make any connection until you mentioned it. Maybe there are some vague similarities, but the fighting mechanics are like a beat em up, and the shooting is nothing like the contra-esque run and gun style at all.
Great game indeed though. The stuff you have problems with doesn't bother me at all, using melee is super fun with all the moves, especially using stuff like the descending heel kick to start combo's. The gun is weak normally but your pretty much supposed to be mostly using the hadouken motion gun shots for long range stuff, which fit nicely alongside the melee combat.
The command for Bloody Dance is shown in the ending staff roll if I remember correctly. It does suck the game still freezes up randomly in mame...
Metro were similar to Mitchell, in that their output was random as all shit, with the various titles probably developed by mostly different teams before the dudes jumped again to another company.
A Gunmaster was on sale a couple years back with the instruction cards that pretty much no one had ever seen which I posted in one of the emulation threads, here it is: