If you don't know mokomaze, give it a try by installing it (opkg install mokomaze). It is the adaptation of the classical game where you steer a steel ball through a labyrinth and avoid the holes. It is a great demonstration of the accelerometers and uses the vibrator too.
I would even love to include mokomaze in the full (unstable) image by default, but that is contingent on some feedback from the community. Should this app waste precious screen space (and disk space) on your phones? Let us know!
P.S. Yes, I am aware that mokomaze 0.5.0 was released recently, but so far it refuses to build due to an additional dependency and this will require major updating of the SHR toolchain
P.P.S. Build recipe for openembedded and added patches are here.