When comparing Blendoku vs Roll the Ball, the Slant community recommends Blendoku for most people. In the question“What are the best puzzle games on Android that a completionist could obsess over?” Blendoku is ranked 1st while Roll the Ball is ranked 4th. The most important reason people chose Blendoku is:
You can complete levels, with additional icons for completing in the minimum amount of moves and under the worldwide average time.
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Pros
Pro Has different levels of completion
You can complete levels, with additional icons for completing in the minimum amount of moves and under the worldwide average time.
Pro Free play
Supported by adverts but if you choose to buy additional level packs to support the developers then these are removed.
Pro Lengthy gameplay thanks to extra tasks
Levels can be completed with star ratings for minimum moves, specific pieces etc. This makes for a good reason to revisit levels in order to complete all tasks.
Cons
Con Colours can at times be genuinely hard to distinguish
Con Too many advertisements
The game is free but there are a lot of advertisements contained within. This detracts from the beauty of the game as well as the gameplay itself.