Should and most likely will lose everything. Sometimes there is a bonus for playing a beta. When I started the full version I got a bunch of happy stars and tickets, but idk if that was from the beta.
Completed Games - 39 Retail - 41 XBLA - 29 WP7/8 - 7 W8 - 2 X1
Most Recent: World of Keflings (W8)