A former ATM software designer for a large bank, Demeter created "Trism" in his spare time and pitched it to Apple last spring. The company made the game available for download with the July launch of its App Store, an online provider of applications for its iPods and iPhones.
Priced at $5, "Trism" earned Demeter $250,000 in profits the first two months.
"It's done phenomenal business," said Demeter, 29, who lives in the California's San Francisco Bay area. "I'm very honored that so many people would enjoy my game. I get e-mails from 50-year-old ladies who say, "I don't play games, but I love Trism.' That's the coolest thing."