Update 0.16 - Quality of life changes

Hi again, We've made quite a few quality of life changes. I hope you enjoy them! Please let us know if there's any issues and take a few seconds to leave a review, we really need your feedback! [list] [*] You can now immediately build over fallen trees and units can immediately move over it. [*] All Steam achievements are now awarded with 50 gems each! [*] The master volume setting is now also available while playing. [*] The number of gems you own are now displayed in the main menu. [*] If you have not finished the tutorial map, a yellow arrow will indicate where it can be selected. [*] The building user interface has been moved slightly upwards, to make space for all the building icons below it. [*] Some icons in the user interface has been improved. [*] The cannon ball explosion now leaves a mark on the ground. [*] Cleared previous map description when re-entering map selection screen. [*] Some wording changes to the talking npc's tutorial. [/list] Till next update, André