Here are some games that work on button phone opera mini browser:
titanswar, a MMORPG that involves taking part in battles, joining clans, fighting monsters, and heaps more
avengers, a multiplayer fantasy game
happytower, a game where you own a skyscraper, and have to manage your employees, and money
amazing pets, a game where you care for a virtual pet
arawap, a chat site with a range of games
if you know more then tell me. Please comment.