Just my 2c... Game Dev Story was one of the first games I installed after I got the market working. Has worked great
I bought it when I had an ipod touch and was stoked to get it on the edge.
I DID have a random screw up like you experienced when I installed google music. That jacked my edge up bad.
But I agree with nikkie. You probably should just get a Fire or similar. I adore my edge and plan on keeping it till it breaks (and then getting another one), but it is definitely not a good fit for everyone.