Yes, plenty - but the way you setup the game (skill level settings) matters a tremendous amount.
My opinion - hardest is best:
-Need 10 time units to play downstairs. (instead of 6).
-Ball ends at drain downstairs (instead of repeat balls until timer ends)
-No carryover of time units ball to ball (instead of time units holding)
-Left side 5 bank starts over every ball (instead of progress saving ball to ball).
It's not for everybody, but I always liked the game.