Well, Ok, I purchased Fist Puncher!
From what's been said, it has all the content of the Steam Release, except Robot Unicorn, as he's steam Exclusive.
The game itself is fun, but lets get an issue our of the way, first.
It loads CLUNKY. The first load is fine, but after that, everything loads as if what you're seeing on screen is being shown to you before you should be able to interact / move any of it. This happens during saving, stage loading, switching options on the level-up screen, cinematic loads... it's a mess.
It's not gamebreaking, but it's a small bit frustrating, especially in stages where enemies run up and attack you immediately.
HOPEFULLY, THIS WILL BE PATCHED. I've seen little talk about the game so far though, so I hope they know!
BUT, if you can deal with that, you have a very solid Indie BEU on your hands, especially for a measly 5 bucks. There hasn't been an XBLIG BEU as fun as this since "Streets of Fury", and this is probably more polished, game-wise...
I've only unlocked 3 characters, have played 2P local throughout all of that, and have only played 3 of the 7 myself. They seem to all vary nicely, with unique special moves, their own intro videos, and personal stat bias.
One thing I'm a bit "meh" about, control wise, is that actions have an odd queue to them, and tapping X twice produces something like a 5 hit combo. The first punch is 1 to 1, but the second press starts a hit flurry. You can cancel into grapples, jumps, dodges, and kicks at any time, so it's not horrible, but if, along with the overly-long action queue, makes you feel out-of-control at times, which isn't something you want to happen in a BEU.
Even though it's very River City-inspired, I have to say, I think the game has a strong, personal vibe, that's a good mix of retro and original. Grapples are actually important (so many modern BEU's lessen their significance), gameplay has it's own rhythm (A few parts from "punch and grapple" double dragon, mixed with a few parts Flying Warriors style "DIVEKICKS FOR THE WIN!", with a helping of TMNT punch-sponge boss battles, but with the dodges and movability of Dishwasher?!?), and the item catalog & special abilities list are well fleshed out, along with the achievement-like Trading card system, and stat-tracking.
There's also a lot of stage-variety, even early on. From Dojo's to Biker Bars, graveyards and Yachts. Even on-truck-back fights similar to Game Gear Shinobi, or Bike Riding Stages like Battletoads / Streets of Rage Remake. And a lot of this comes with their own enemies remixes, keeping things surprisingly fresh. (I hear some of the Kickstarter-added characters even got their own custom stages with unique enemy types...)
I hope to see it patched to improve performance, but beyond that, I quite look forward to getting back to it, and exploring it even more!