Pebble palace

I've attempted this a bunch of times, but it has become too annoying. The balls that should go sideways as they roll over stairs often don't. Also I'm running in to a dead-end with no visibility on internal mechanisms, nor the certainty that the mechanisms work as they should. I think there's great potential, but that potential is not coming out.

Just like @Block builder I'm getting nowhere. No clues, so getting stuck at the same spot over and over. Can't release R, can't push more than 4 balls...

@Block builder @Sculron Thanks for playing! When you go to the opposite side, you need to use tricks!

Spoiler: My way