That's really helpful (and a little depressing, reading the 0.67% conv rating for Gasketball), thanks. I was thinking of going freemium and wanted to offer IAP just for skipping ahead, or unlocking bonus features, nothing that's needed for the actual 'normal' gameplay, but seems like not the way to go to stand a chance of making decent sales. Will try and balance it I suppose.

And I'm downloading Stratosphere now! Always looking for good on screen two player games