Flappy Bird has captivated the masses, but apparently also some of the world's best indie game developers. Creator Terry Cavanagh and Canabalt / creator Adam Saltsman have offered up their own takes on the 'ultra-hard, takes one button to play' game genre. Cavanagh's title, asks you to maneuver a block through a claustrophobic series of tunnels, and includes the developer's trademark graphics and schizophrenic electronic soundtrack. Saltsman's game, lets you commandeer one of Canabalt's many pigeons as you avoid razor-sharp spikes. Both games are near-impossible to survive for more than three seconds at a time.If you're a fan of Flappy Bird's masochist game mechanics, be sure to try them both out. If you're in the mood for something flappier, try.

Maverick Bird is a Flappy Bird tribute by Terry Cavanagh (the maker of Hexagon). The bird is quite hard to distinguish and the pipes changed, but the spirit (and the difficulty level) of Flappy Bird were kept! You can fly up (with the up arrow key) and dive (with the down arrow key). Enjoy Maverick Bird (don't forget to listen to the music, which is great).