An immensely rewarding glider sim with perfect difficulty curve and lovely, mysterious vibe. But playing this as an arcade game won't get you far: it requires thinking, planning & minimal/accurate input.

Half a star taken off due to the fact it could be more accessible in the early stages. Almost everybody I know who tried it gave up on the first stage as they expected it to play like an arcade game. They didn't realise that you don't really need to touch the controls at all on the first stage.