I tweaked the game a little bit now. I disabled the Enter key now, it was a shortcut for myself to get to things. Maybe I should be more clearer/indicating user input on the handling of buttons in the menu..? Anyway, the buttons are those squares in the bottom. They correspond to the "gates" and color on the left side on the screen. The game is made with mobile in mind, so not much of keyboard input this time. Hope this helps a bit, sorry for a slightly wrong build.