how do i exit the intro screen using keyboard? i dont have a game controller attached
Either hit Return/Enter on your keyboard or refresh the page in your browser.
NOTE: the game does NOT save your progress (I hit the code token limit) so you can also click the pause button next to the right side of the game window, then continue in that tab later.
If you are on mobile, that little rectangular button above the O/X buttons is like pressing Return.