Red Door Roulette combines a single-zero wheel with a Crazy Time bonus. A slot-style stage assigns keys to between three and fifteen numbered positions. A winning straight-up bet on a keyed number opens the bonus; an outside bet covering that number does not provide the same entry condition. The assigned multiplier can also enhance the bonus wheel values. This is a roulette game-show hybrid, not a standard wheel with unchanged straight-up payouts.
To compare related live casino formats, read the rules of XXXtreme Lightning Roulette.
The library also explains roulette wheel formats and multiplier rules to help put these mechanics in context.
Source: published game information.