I think having an easier way to get rid of trees would be a big plus. Because in forests when you use the explosions to get rid of them, the gold and gems get lost in the thick areas. Also a way to upgrade finding gold and stuff would be good as well. It will add more to upgrade for the game and make it easier when your towns get big and stuff gets hidden in them and scatterred all over the map.
The moving issue when your not pressing the key isn't because of the game. To fix it go to the tools option on your browse (usually in the top right part). Then go to internet options, then security, and there should be a box that says enable protected mode. Uncheck the box and refresh your browser. This mode allows for lesser security, so if your worried about that then just check the box again when you start browsing other sites. It fixed my problem with this game and any game after that. + this comment if this helped you so more people can see this.
the key to getting the final ending is when you fully upgrade focus on the last few trophies and forget about the ones that give you little money. Just keep going to around 1800-2200 and collect the big and smalol diamonds. I at the end I earned close to 230,000 even before I was awarded any trophies.