Quoted from ForceFlow:Bally Space Invaders
The art package is fantastic, but the gameplay is meh. The problem is that it's a super widebody, and there isn't much on the playfield to fill it. Most of the playfield is just wide open space.
Interesting- I always felt the challenge here was managing side-to-side motion and flipper control. Very tricky with the four flippers in that configuration, keeps me liking it.
You're right that there are only four or five things you'd actually want to shoot for despite it being such a wide machine, and two of those things are the horseshoe entrances.