Media queries and min height.
No prevent default on touchmove and touchend.
No prevent default on touchmove and touchend. Again.
Body height (css).
No preventdefault on touchstart.
No h1 on max-width 420px.
No h1 on max-width 420px, but some padding on body.
No h1 when game screen is active.
Minor updates.
Minor refactoring.