elevated – a stunning 4 kilobyte demo released in April of this year. I wish this computer could play HD video. 4 friggin K! The app uses Perlin noise procedural textures (a more detailed explanation here) among other things to get it that small.
Also from April, Excelence, done in Excel.
And, again, the fantastically psychedelic palindromeda suger, not for epileptics. The switchback occurs at 2:00.