Mark levels that were beaten without using boosters or continues in a special way

Currently, on the map, you can see which levels you completely mastered with Sugar Stars, or levels that you beat in one try. But one feature that would be very nice to have would be if the game remembered which levels you were able to beat without using boosters or continues and indicated such feat in a visual way to reward players who achieved a difficult level without relying on boosters.

I would imagine this to be implemented as coloring level numbers green on the map to indicate that you cleared the level without using a single booster or continue.