My fingers seem to remember that dig-keys were at the numeric keypad too (End, PgDn). So you could play it with one hand. Those Z,X - keys are the worst choice

My fingers seem to remember that dig-keys were at the numeric keypad too (End, PgDn). So you could play it with one hand. Those Z,X - keys are the worst choice, cause they are not easy to find blindly with left hand.