The 100% category should be called "All cubes%", because in the 100% category you should get all cubes and completing the Google Play achievements.

The Google Play achievements are: Die cause of an arrow Die cause of a gear Touch a kiwi and more.

I can change it though I don't think you can reset the achievement so didn't take it into consideration

Achievement can be reset, it is done through Google Play Games, Settings > Deletion of the Play Games account and all data > Delete data of a certain game