Like the little prickly wonders in the Beatrix Potter books, this hedgehog is cute. Unlike them he is not safety conscious, quite the opposite in fact. The ultimate aim to launch him into space but he is going to crash to earth a good few times before you succeed. In order to gather the right skills and equipment (including funky goggles) to get your chap into space you need to pick up coins and buy upgrades with them. The final achievement is worth it though: so beautiful, so vast.
Use the mouse to drag and release the hedgehog and then use the left and right arrow keys to power the left and right boosters and, once you've got them, the up arrow to fire yourself higher, and the down arrow to release your parachute.