Small suggestions: 1) Allow to zoom out on campaign menu. 2) Allow player, while playing a certain map, to see what are the wave numbers still needed to reach to unlock other maps. 3) Allow more zoom out. 4) Disable the feature where by clicking the already selected item it behaves as if the cancel button is pressed. This is redundant since the cancel button exists and I have cancelled accidentally because of this. 5) Allow deletion of already planned structures (accepted but not built).