The stars require twice as much score for 3 stars, hence can be hard or nearly impossible to attain. If you have sugar stars and a golden crown on a level, then it will say "Sweet Combo! Mastery on the first try!" and higher points. When the target score for Sugar Stars is reached, the voice in the game can be heard saying "Sugar Stars!" If the player passes the level, he or she will keep the Sugar Stars, indicated by three cyan stars on the map for that level. The player cannot earn Sugar Stars before Level 51.
Obtaining Sugar Stars in levels contribute to earning crowns.
They were introduced in an update in July 2019.
Sugar stars cannot be earned when playing on Flash. However, should the player finish a level with sugar stars, playing on HTML5, then the game would register as if the player has earned four stars.
If you go back to the Flash version of the site, there were no stars on the level you earned on the same level with sugar stars. When you click on this level, it doesn't say the target score, but there were three stars. It also said "et taret," which means "and it would be" in Latin, at 1,000,000 points. In some levels which you already obtained sugar stars on HTML5, it sometimes became impossible to get a million points on a Flash playthrough.
This glitch was never resolved, since the Flash version officially stopped developing after the release of Peppermint Portal in 2018, while Sugar Stars were introduced in July 2019. Flash was intact for just over a year at the time sugar stars can be obtained.