Obulis is a puzzle game that relies on physics, momentum and gravity. There are colored balls hanging in chains and using various items obtained in the map, the player has to guide those balls to the respective colored pots.
It is a great game, beginning with simple levels and gradually progressing on to harder and complex levels as the game progresses.
Some levels are actually easier than the others, even though they award higher stars of completion than other tougher levels. But this is just me, difficulty actually will vary from player to player. Some levels are constrained by your timing - it just has to be perfect or you lose. You definitely will be wanting to tear your head off at some of the tougher levels.
Obulis being one of the oldest games in genre, may seem lacking in advanced features but nowhere will the gameplay dull out. All levels occur at different loactions, each with its' own set of objects that can be utilized to help the player accomplish his goal.
All being said, this is a great game, containing upto 10 hours of fun gameplay.