Millionaire uses the Megaways system, which means the number of ways to win changes with each spin, up to a maximum of 117,649. The game features a 6-reel setup where each reel can display between 2 and 7 symbols. This variability creates a dynamic play experience where no two spins are the same. Key symbols include the traditional card ranks, along with higher-paying themed symbols that align with the game show motif. Wins are formed by matching symbols on adjacent reels from left to right, and the cascading reels feature ensures that winning combinations disappear to make way for new symbols, potentially leading to consecutive wins.

Without specific data on the betting range, it's safe to assume Millionaire accommodates a variety of budgets, typical of BTG games. The high volatility suggests that players should be prepared for longer sessions to ride out the variance. There's no mention of a bonus buy feature, so accessing the game's special features will rely on triggering them naturally during play.