Yes, the walkthrough is definitely an option, but i'm trying to do it without. anywayz, since my level 10 spoiler wasn't clear enough, here's a screenshot(too bad we cant reply levels, had to erase :S).
SPOILER: http://img193.imageshack.us/img193/1415/level10c.png
Now I know why people are complaining about level 11 XD.
ok, SPOILER, I REPEAT, SPOILER! ok, you have been warned. level 10- Put two boxmen at the bottom, one near the left spikes another on top of the faded spikes. let a boxman run between them two. go back to the switches and use the last switch to kill the blocking boxman and switch between spikes so the running boxman can get the cube
The point of the game is to save you loading wait when loading games just to chat(as some people's internet are slower than others) which might I add, is possibly a reason why there's not a lot of stuff in the game which would make it load slower(that and the artwork/coding involved)