crack-attack only partly visible when win.x>win.y

Binary package hint: crack-attack

In X11 windows with the width being greater than the height, crack-attack's pit is only partly visible.
A portion at the top is cut off.

People get such configurations when they maximize the window or enlarge it with the mouse.

Also, it doesn't handle resizing the window well, this often also results in parts of the game being cut off.