I've put together a small game - I'm not sure how much longevity it has in it but I think I may be onto a winner. I don't want to upload the apk file here - I just want to send it to a few (5 or 6) testers. Email me - email@example.com - and I'll email you the apk file if you clearly state that you won't disclose the nature of the game to anybody else. It's kind of 1981 meets 2008....
Obviously you must have a G1 for this testing. There are a few more pre-requisites but I'll let you know on the email.