Ending: for now it was just a sandbox test, I will use this to build a given challenge, and have a build-path with per-level-up decisions (e.g. buy piece/lose something/expand map).
Refresh: You have a little cross on the top-right corner to go back to the main menu.
Thank you as always for being so reactive :D, if you have anything you consider would improve the game, I am eager to read about it.