I was at a Goodwill a couple of days ago when I saw a copy of the first Donkey Kong Country. I didn't have it, and it was only a dollar, so I bought it. When I got it home though, it turns out there's a time limit of 300 seconds when you play the game. I looked more closely at the cartridge and it says "Competition Cartridge".
It's not much good for playing, but maybe it's worth something? Does anyone know anything about this 'special version' of DKC?