Perfect Balance is series of extremely challenging and difficult physics and gravity based small balance game, with ingenious design. Your goal is to, in specific environments, through placing bricks in various shapes to achieve their overall balance.
Open Doors is a Sokoban style (both interface and operation) series of small puzzle games, yet it's a quite another gaming style and concept. Endless changes are derived from its simple design, on the whole it tests the players' logical thinking ability - the chain reaction caused by the every move needs to be considered clearly.
3 Slices is a simple but very challenging physics-based small puzzle game. In spite of the simple graphics, the game is well-designed and very addictive, which needs you have very high ability on logic analysis and judgment.
BlocKage is a series of Sokoban style, logic-based small puzzle games made by Blue Wolf Games (has gone). You will be faced with dozens of brain challenging levels in each game, the goal is same - to adjust the state and move the colored boxes to the right place in order to fill all the gaps with corresponding colors.