Robot Unicorn Attack uses a concept that's been done many times before (especially in the Flash game scene), but what makes the game entertaining is the emphasis on humour. By clearly embracing how silly the game is the designers provide a lot of comedy value, with an overly silly aesthetic and funny music. The controls are very simple, meaning that anyone can attempt to beat the high score. Still, it's hard to rate a game like this highly when the premise is this limited.