The original Doodle Grub was pretty popular (to put it lightly). Well, Pixowl is getting ready to release a sequel, simply called Grub.
Grub will use a similar series of accelerometer controls, naturally. However it's also going to include new power-ups, new enemies, new obstacles, and bigger maps that scroll to follow the grub as he crawls along. You can also save and share video replays with your friends to see who's grubbiest. There's even the possibility (possibility - it's not a certainty yet) of simultaneous multiplayer in future updates.
Much like the original, Grub is going to be free-to-play. You can keep an eye out for it in the App Store at the end of April/the beginning of May. Or you could always request access to the beta right here.