Quoted from FatPanda:There are flipper power adjustments that you can make in a JJP game. I only own SAM games, so I don't know if you can adjust power on SPIKE/II games.
I don't know whether all SPIKE 2 games are the same. On BKSOR, flipper power is adjustable (and each flipper can be adjusted separately). But it's not adjustable with quite as much granularity as other features. For example, slingshot power can be adjusted on a numeric scale. But flipper adjustment has just three options: SOFT/NORMAL/HARD.