Driving games is one of my favourite game genres. Not to be confused with racing games, in which you race around a track lap after lap after lap. I love the ones that let you drive through an open, non-circular course. Beautiful, eerie landscape + smooth rendition of speed = Bliss. Some of the earlier Need for Speed games made me feel this Flow.
Drivey manages to do this in less that 300Kb (graphics included).