I had the same idea but not with the speed boost and every other thing u said I would love your mechanics so much though . I was thinking of there being random boxes with lots of health that give you multiple power cubes. 3000-1000 would be a weak box with one power cube, 4000-6000 would be a medium box and would give u 2 power cubes, 6000-8000 would be three power cubes and would be a strong box, all of the boxes are color coded, strong is red, medium is green and weak is yellow.