System: Kindle Fire HDX 8.9 After the update I correct like my first review and give now 4 instead of 2 stars. The operation is due to larger buttons much better and the serious bug in the campaign has been resolved. Also, the memory requirement is low and the resolution is now adjustable in 3 steps. Furthermore, remain the following advantages exist: - Pretty graphics - Good campaigns and thus an easier introduction to the game - Good gameplay - Good handling and control Whether the somewhat inadequate level of difficulty was increased, I can tell only after a detailed review. Therefore, so far only 4 stars. Conclusion: A beautiful builder / strategy game which I find very entertaining.