In Flatland, it is your mission to destroy wave after wave of... things. You get points. OK, the idea isn't completely original, but the design is quite interesting. At first you start off in a tiny ship with litle armor and a miniscule weapon. Destroying enemies will cause them to explode in an array of large blocky pixels, the collection of which upgrades your ship. The interesting bit is that collecting an odd number of them gives you an odd shaped ship until you gather more and regain composure.