Thanks for playing! Yeah, the goal is to cover 50% of the white patch on the ground... it's a dynamic actually hammered in at the last momenta as it was fun just to fly around for me too but I felt a game needed a goal of some kind. I got the "toy" feeling to late to embrace it :(
Proably you lost cause the battery went dry, or got too far from the terrain. The sound bug could be the reason for other experiencing freezing, webaudio is a mess... oh well, I'll get it right next time.