I was playing earlier today with absolutely no problems. Got on just now, and decided to play online with a friend of mine. Then, I realized I could only extend/contract, even using z wouldn't work, however, hitting c would work. Tried offline, couldn't do it either.

Don't know if it makes a difference, but I got a lot of new colours today.
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nevermind, apparently my mouse buttons was set to three and needed to be set to one.