There is a mod or 2 you can do to that game to make it harder,
". One such mod is to create a gate below the standup so that shots to it exit into the plunger lane, and to also remove the gate behind the left flipper to make it harder to get control of the ball on that flipper to make the target shot."
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This was often done in competitions.
I temporarily took out the gate by the left flipper for a league match to make it harder to trap the ball on the left flipper then shoot the right target.