Robo5

If you were a lab experiment and woke to find yourself in a freezing room, you’d feel a bit miffed and would start looking for answers. On discovering you were a robot, you’d perhaps mooch about looking for a Wi-Fi hotspot or, at the very least, an instruction manual. No such luck for Robo5 – he’s simply dumped in front of boxes. Lots and lots of boxes.

His aim is to climb each level’s box mountain. Robo5 is surprisingly nimble (the controls are odd, but are ideal once mastered) and can clamber about the pile and pull and push boxes. Through an odd quirk of the game’s physics, any box with one full edge meeting another stays put.

At first, this detail isn’t useful – you can drag boxes about and easily get to the exit. Later on, though, the puzzles become fiendishly tricky, requiring plenty of planning, not least when breakable and electrified boxes appear, along with a moves limitation.

Bung in a vexation-defeating undo and an AI that amusingly flat-out lies during proceedings and you’ve got an essential iOS action-puzzler.