- improved MULTI_MODE by adding torque and speed limits
- BEGINNER MODE: Power ON + Brake [released] + Throttle [released or pressed]
- INTERMEDIATE MODE: Power ON + Brake [pressed] + Throttle [released]
- ADVANCED MODE: Power ON + Brake [pressed] + Throttle [pressed]
- made Voltage mode as default for hovercar (better for toddlers)
- made MULTI_MODE_DRIVE active as default