Maybe some private matches?
Also, a map creator that people can make maps on, and then submit them to you... I have no idea how the levels are generated, but maybe that would help you a bit...
plus if you think its a decent idea
plus if you think there should be an achievement for getting all in game achievements! 5/5
only game i know that i have played for seven hours straight for fun
ummm... not just the bird part is canabalt homage... the entire concept is essentially canabalt: trying to get as far as possible using only jump and it getting faster as time (and distance) goes on... BUT I LOVE IT!!!!! 5/5