I agree with Redazrael. I am down to just the robot and the tough guy. based on what the robot says I assume he is supposed to be used as a weapon. I can't find the command maybe I missed one but the only things that seem to work on him are splash and sploosh and nothing seems to work on the tough guy.
(SPOILER!) To defeat the others:
"Crash" the hobo and blue suit first
Chick with gun: "splash" robot then "crash" her
"Crash" everyone else.
That will leave you with just tough guy and robot. And the guy in the window whom you can click on but I can't get a bubble on him.
Yeah I have wasted enough time trying to figure this out. There are too many commands that do the same thing, and some of them don't make much sense. I think that the difficulty in this game is that you threw in a ton of useless commands with the 5 or so that you actually need. Otherwise I think it is fun. It could just be better. And I would really like to know how it ends, but I don't want to win by silly trial and error.