[H] background in underground levels scrolls far too slow, makes them
hardly playable, since once too easily get focused on the
background instead of the playfield
-[H] The scrollstart position still isn't the same as before the changes.
[H] Frame ratio code has been changed and so the animation may need tuning.
Somebody do some testing and change the definitions regarding this.
[M] When aborting a level, lives and score should remain the same as they