Spoiler: Hints Spoiler: Ball Routes - Some balls have multiple purposes Spoiler: Ball Uses - Some balls have more than one resting place Spoiler: Still need more - Some holes may need two balls Spoiler: Video Solution
Cute design & very nice logic gameplay... Spoiler in my case finding B's push was the key thanks @Meko Guy
Pleasant logic level where solving each area leads to a good ending. Played this instead of Purely Logic as it appears to be a more accessible and beginner-friendly option. The ball ride was quite difficult to control and thus required a restart.