Nice gameplay but requires large resources. Chp.8 on 7-star is challenging and near impossible @11. Requires skills or get away with upgrades draining exponential resource returning only 0.1x increments. Bugs: 1_Occasional faulty updates: links back to the installation page with no update option. 2_Upon winning trophies, gems are not awarded to the counter even though the animation shows the awarded gems transferring. 3_Game fails to connect online at times while the network is active.