Stone Code

I dropped a star for 2 reasons. 1 - I'm not a fan of hidden and the code part (although I got it quickly) I wasn't going to spend much time on it and 2. Unstable. The ball didn't stay in the slot ever time so having a hold back device would have be nice. I see you implemented auto pilot on the back side to get to the code portion. Tapping a lift and moving it out of the way is called auto pilot. BTW, auto pilot can also be used to get up on a lift as long as the lift is only one block high - my point, if B missed the landing on the front side and landed on the surface then B could get on either lift in the same manner (tap the surface where the lift will be and B climbs up) Hopefully that helps you.

I agree mostly with @gmacpro on this one. The unstable ball drop (the ball didn't always drop, and when it did, it rolled away before I could get down) and unstable B drop (one of the first attempts, B did fall down the right way, went all the way down as intended, but the ball was already gone. Second attempt however, B bounced off an edge somewhere, and fell all the way down on the white. That was a good thing, because that way I could get him past the ball on the lift, like how Gmac explained before)
Shortcuts: as I just said, dragables on the floor lets you autopilot on them, wich gets you past the spot where the ball drops.
The code? I don't want to play 'crack the code' for the next few hours, and I cannot see any hints for the right code. The levels that inspired you, had the right code in the level that came prior to the one where you need to implement a code. Since this is the first in this series, I have no idea where to find the right code.
So as you see, there are many shortcomings in this level. As a matter of fact, I didn't even finish it, because of the code.
I usually don't rate a lvl that I didn't finish.
I did now, since I almost finished, and especially since I also played the next lvl in the series, wich is better already.
So there you go; 2 stars for this lvl, but you are improving already, as your next lvl is better than this one

@gmacpro You're right, the ball is unstable. I'll fix this problem in my new level

@Sculron Thanks for your vote. Okay, i'll fix this in my new level

This is the code: Up, down, down, up