Genre: Physics

In this section the physics engine is the real star. Rolling Maze has you tipping a maze like a mug to tumble balls out of it; the sequel, Rolling Maze 2: Find the Exit, nearly doubles the level count and adds obstacles. High Tower hands you blocks, a ruler and physics that does its best to knock everything over — see if you can reach 50 metres.

For something more creative, Water Flow: Happy Glass gives you a pencil: draw any shape to guide the water, across five themed worlds from a classic lab to fiery lava. Pixel Chaos works differently — you get a cannon and 10 attempts to wipe a pixel picture off the screen. Ideal for tinkerers who enjoy watching things fall, roll and scatter.