Hey, thank you for the feedback!
I'm gonna try to fix the bug asap, it should not be very complicated. Although it's not said in the game you can press [Esc] to open and close the menu as well so while it is not fixed use that alternative.
I was questioning myself whether to allow players to make a choice at the very beginning but since I'm thinking of expanding the game into a sort of rogue-lite there will be other ways to make each run different from the start