A fairly simple game, but everything works well enough. The only thing I would suggest adding would be automatic camera control. have the camera automatically center itself just ahead of the average location of the rumbas. Space can make the camera look ahead a bit further and shift can make it look a bit back.
Also some things that let the rumbas interact with each other other than using the same controls would be nice. Maybe a button on one of the rumba's areas could open a door for the other rumba?