Robin Williams (1951-2014)
Robin Williams was an absolutely exceptional comedian, talented actor, and holder of a special place in video game history: He was the first really famous gamer I know of. I’m sure there were others, but they kept a comparatively low profile, unlike one...
Don't neglect plants! By evolving them and matching them, you get crystals. And you'll have to rely on these as crystals grow increasingly scarce.
Deal with bots quickly - once you get three or four on-screen, things get very difficult.