I love this it just needs more work and whenever a balloon is placed so that the mouse is pointing to a point lower than the base platform you spawn on the balloon will have no buoyancy and will act like a marble on a string, but that only applies to balloons placed below the base platform. also could you add maybe a grid placement ability to make things more precise and please add ballast things that change their weight so you don't have to delete and place balloons while trying to stabilize the craft.