Yes, they do. When you mix light, that is. Yellow is created by combining R and G in your LCD monitor, for instance, or in multicolor LED lights. Not when you mix pigments, like in your printer though.
that sphere was just plain evil. Only other issue is the music causes major problems after a while the game will just freeze up after I restarted with music off it ran just fine.
This seems to be a problem on Kong's side, I'll ask about it...
EDIT: Audio still works in Firefox (at least for me), but it's muted in Chrome for some reason. o.O
 "ZS Dead Detective - Pumpkin Dead"){kind=icon}
 "Laqueus Escape - Chapter I."){kind=icon}
 "Trader of Stories - Chapter 2"){kind=icon}
 "Medieval Cop 9 -Song & Silence- (Part 2)"){kind=icon}
 "Demented Shadows: Prologue"){kind=icon}
 "ZS Dead Detective - A Curse In Disguise"){kind=icon}
 "Tales of Nebezem: Elemental Link Part 2"){kind=icon}
 "Tales of Nebezem: Elemental Link Part 1"){kind=icon}
 "Medieval Cop 9 -Song & Silence- (Part 1)"){kind=icon}
 "Creeper World 3: Abraxis"){kind=icon}
 "Tales of Nebezem: Droid's Quest"){kind=icon}
 "Medieval Angel 5 -My Destiny- (Part 1)"){kind=icon}
 "Tales of Nebezem: Four Fates"){kind=icon}
 "Tales of Nebezem: Gnomish Plot"){kind=icon}
 "Faraday's Flaw"){kind=icon}
 "Aground"){kind=icon}
It can be tricky. Best to start with Enbanas (the pink ones).