Sunny Boy pointed me towards Armadillo Run which is an ultra addictive "physics-based puzzle game". The "physics-based puzzle game" did put me off downloading it initially but it is definitely a cool game and addictive. The beauty of the game lies in it’s simplicity.
"You have to build structures with the purpose of getting an armadillo to a certain point in space. There is a selection of building materials, each with different properties, which can be combined to form almost anything. The realistic physics simulation gives you the freedom to solve each level in many different ways."
The game starts with a 10 part tutorial which guides you through how to play the game – how to add materials, tension, timers, etc. Unfortunately there are only 6 levels in the demo but they should give you a pretty good taster what the puzzles are like and should last an hour or so.
It’s a 1MB download.