Another of
David Rosen's independent game design tours, this time focusing on the delightful and beautifully produced
Aquaria.
Design Tour - Aquaria from David Rosen on Vimeo.
On a similar topic, go play Spelunky. It's a new free game made by Derek Yu, the artist who designed Aquaria's awesome painted graphics. Spelunky is super fun; a brutally hard exploration-heavy platformer where all the maps are procedurally generated.