It is a fun game in the beginning but the higher ore level or technology level you get to the longer it takes to build or refine that item which is kinda frustrating when you can only play for 30 seconds before running into a timer of about 40 minutes before you can progress. They do conveniently sell gems to progress for the type of people who want to spend $20 or more anytime you start to play. It would be a better game if there wasn't such Long idle times for no gain