There is nothing that reminds me more of my first cellphone, a Nokia 5180, than Snakes. It was the classic cellphone game before BrickBreaker hit the scene. While there have been a few ports in the past Terry let me know that Ajani InfoTech has released their own Snakes Game that has nicer graphics and better gameplay on the BlackBerry.
Snakes by Ajani is a paid game but at $0.99 in App World it is not going to break the bank. So far reviews in App World are very positive so check it out! The only real downside is that there is no free trial.