Would be interested in playing longer if the ads didn't come every 30-60 seconds of gameplay. It's a shame... I would do the volunteer ads to get the resources, but the mandatory ads just make the entire experience so annoying. Especially since you have to click 2-3 times to exit an ad. You CAN pay $5 to remove the ads, but the game hasn't built any goodwill or enough confidence that there is a full game there for my taste.