Flat Out is a straightforward, no-frills puzzle game that is great for time-wasting.
The aim is to create a loop of gems in grids that become more complicated the longer you play. The bigger the loops, the less fuel you burn (you're in a space ship), and the more time you have to score points and level up. The arcade-style graphics are pretty retro, but also boast a slightly trippy feel.
It's simple gameplay, but Flat Out is a brain teaser that will seriously challenge your ability to spot patterns.