A nice puzzler that really gets you thinking. The concept is simple, and everything is explained clearly for a beginner as soon as you start. There's plenty on offer here (levels, medals, etc.) to keep any fan of puzzle games coming back for more.
I personally enjoyed the Clear Levels section the most, specifically the "Less Moves Challenge", as those levels made you really think and plan your movements based on ball position & available area, as opposed to Survival, which had me hoping more often than not for lucky ball placement.
Overall, though, this is really great work!