Great Job
This game definitely deserves the #2 spot on NG. I really loved the characters, particularly Salad Fingers. The story and challenge modes were lots of fun, and kept me occupied for hours. If you decided to make a sequel for some reason, I would only have a few suggestions.
More enviornmental hazards/level variation. While features like the teleporter and the compacter were good, a few of the levels, like the slaughterhouse and the convenience store felt sort of bland. Just add some brief variation to the levels (like the challenge in the store where the lights go on and off0.
A practice mode w/o tutorial. Pretty self-explanitory. It would be fun to practice different combos on stationary enemies. This brings me to the next suggestion...
Varied combos. Rather than pressing the same buttons for a combo for every character, maybe you could mix it up by having combos of varying strength and difficulty for each one. For instance, a weak character like AH could have a simple and relatively strong combo, while a strong one, like Nene would have a more complex and relatively weak (but still strong overall) combo. Also, it would be cool to incorporate blocking into combos as well.
More unlockables! I like the idea of using money earned by winning to unlock various features, but other than Piconjo and Convict, the unlockables seemed a little weak. Maybe you could buy alternate skins for your character or newer attacks instead.
More characters. I'd personally like to see Hank Wimbledon and Darnell the next go-round.
All in all, it's really fucking great game. I hope you guys keep up the good work!