Google released Android version 1.6, code name Donut. Goobers Vs Boogers is now updated to ensure compatibility with the 1.6 release as it rolls out to phones. I don't think anything would break (and Google agrees) but it's best to be on the safe side and upgrade to the latest SDK (and Google agrees again.)
After it is clear that the game still runs well on Donut, I'm going back to add more features. I've got a few weapons in mind as well as a handful of small improvements.