Keep a number of balls from colliding while attempting to spot ELVIS amongst all the imposters. This game tests your ability to multi-task under increasingly stressful conditions as more balls are added and the speed increases.
My take on a classic puzzle game from the 90's. Combine randomly generated atoms into molecules without leaving any "orphan" atoms. A very simple concept which becomes much more difficult at higher levels when specific tasks are introduced.
Mr. Roboto is a re-creation of an all-time favorite game from the 1980's. "Mr Robot and His Robot Factory" was a fantastic early platformer available for the Atari 800 computer. The graphics and sound were primitive by today's standards but were pretty cutting-edge at the time.