There's a new version of the N-Gage app available for all compatible phones which (amongst other things) fixes the infamous 10,000 points bug. You can download the new version straight onto your device by opening the app, selecting "Options" and then "Check For Updates". Alternatively you can download the new version onto your PC and then install it manually, which you can do from the official website's "Get N-Gage" section. You can read more about the new version over on the official forums. (via the Official N-Gage Blog)
The N-Gage platform is currently available on the Nokia 5320 XpressMusic, N81, N81 8GB, N82, N85, N95, N95 8GB and N96. The latest firmware versions on most of these phones should include the N-Gage app built in, but if you want to install it manually see our handy guide.