I've had the earlier version on my iPhone for a couple months and I loved it, it was a 5-star app. It worked fine on my 3G with OS 3. When I saw that an update was available, I downloaded it using my iPhone (not my PC). Sadly, the update completely destroyed the app. There is no interactivity at all, just a clunky fake-looking shimmer in the water that does not change at all when you touch it. I don't know what they did, but this is not an update, it's an app-killer. Since I didn't use iTunes on my PC to do the update, I was able to restore the older version (1.2) by deleting the updated app on my iPhone, then synching my iPhone and reinstalling the older version from the PC. It works fine. So my advice is *do not* download the update, keep the older version, and if you don't have it, don't download this version (1.3), it's totally not worth it. Wait for a fix to the new version, and then don't download that until other users try it out and report that it works.