@Meko Guy. Hello! What hidden do you mean? I made all draggables exposed. I guess the hidden that you're referring to is the slider underneath the stair draggable. Or the high blocks darken lower blocks.
@P_simorf - The underside - the water was rippling so I suspected a motor but couldn't see why there would be a motor as the water made it impossible to see.
@Meko Guy. I've just rechecked the level and the water is indeed rippling. The motor is hidden but it's not attached to any block (thus the metal is a budgeable).
@P_simorf - Thanks for info but I just looked with Mekostudio and your comment has been proven wrong. Check out video. This is your level within Mekostudio. The motor wasn't visible thanks to the water and darkness on the underside but removing the sides shows what is in there. This motor is surely hidden to me. Spoiler: Hidden Motor Now that I see what is in there, I can see the game play....
I was going to go 3 stars as the mechanism didn't work very good. After R was in position and I snapped the mechanism with the slider (I mean a good clean push), it only moved one block so B couldn't pass. It worked well on my first attempt but I had drop the lower ball so needed a restart. Restarted and the same happened. All okay the next time. One of the balls (lower) wasn't used - was it a red herring?
@Meko Guy Spoiler The lowest ball is red herring at first part. Just realized that not bumping the lowest ball is indeed possible. You'll have a lengthier yet much smarter gameplay than the gameplay with bumped lowest ball.
@P_simorf - I got the lower ball after the high ball and still had troubles with the game play so skipped it and it was much easier but obviously not at smart or clever as the intended way .
