JamLegend is a very addicting game that can be played by anyone who has internet. It's like a simplified version of guitar hero and you can just play it through your web browser! Just use your keyboard as a guitar and you're ready to jam like all the other players. It takes some time to master it, but only a few minutes to get the hang of it. If you like playing games like these, you should definitely try jamlegend. It's easy and fun!
Just go to http://www.jamlegend.com and have fun! No registration needed, but if you want your scores and progress to be saved, signing up is very easy. See you in the showdowns! :D