Immortui is a 2D top-down puzzle game, combining classic shoot 'em up mechanics with an entirely new flavour of puzzles. It was designed and programmed by Samuel Silvester, who was 15 when Immortui was published.
Immortui's website: http://immortui.hogpog.co.uk/
Buy it on Desura: http://www.desura.com/games/immortui
Interview with Eurogamer: http://www.eurogamer.net/articles/201...