Nick, dont forget that the bottom playfield has 2 x sets of 3 drop targets (one each side) to shoot for AND >
Also BK2000 has a total of 5 different lanes (shots) on the bottom playfield to shoot for, which means there are 4 more shots/lanes to shoot for over and above the left lane shot which gets you to the top playfield. Of the other 4 lanes to shoot for, at least one other can get u to the top playfield, and the other 3 can award many points n bonuses, as well as give u a multiball etc. Thats a total of 5 different shots on the bottom playfield. One of the lanes has a diverter in it which either allows top playfield continuation or sends the ball back at you fast, very fast like the other 3 lanes. And the far right lane captures the ball and can allow the spinning wheel to give different awards or a multiball. Thats five different shots on the lower playfield, not just one !
The game is most definately not only about getting to the top playfield. Alot of people dont realise that until they have played the game and made all the different shots on the bottom playfield. The bottom playfield is extra extra FAST which makes alot of this easier said than done.
BK2000 is far ahead of its time and is still one of Steve Ritchies best designs ever, but as good if not better than alot of the 1990's DMD machines.
I reckon a brand new STERN design with a identical playfield and very very similar inserts/lightshow etc would be a cracker of a game. BK2000 hasnt aged a bit since 1989. They could have stuck a DMD with it and released it in 1999 and it would not have looked out of place at all.