I don't understand the mini games that require you to use the WASD keys. No matter which key I hit the bar drops down rapidly. What is the technique you're suppose to use for those types of games?
You can use WASD? I just use the arrow keys.
On normal difficulty, play slowly. Press the correct button just once when the bar drops, then wait for the next time.
Most of them are timed - if you draw them out, you get more experience. On normal it's about 52 seconds for max xp.
The gym game is the one scene that seems to be only combo based. Draw it out to 37 for max xp.
Or finish them sooner if you're not powergaming, but there's no need to rush.
On hardcore, you need to play a lot faster, but why play hardcore unless you're farming xp anyways.
The other game is just right & left buttons. Match the rhythm of the game. Play slow if the bar moves slow, play fast if the bar moves fast. Keep the bar in the middle.