10 Balls

I have won twice but have not found a reliable gameplay to get the lower star.

I completely understood the logic of the level. The idea is very interesting! But it's very, very unstable. As far as I understand, this is your idea and this is the complexity of the gameplay. But it is very annoying that it is impossible to control B's micro fluctuations, and he can push the ball in the wrong direction. This is complicated by the fact that there are a lot of balls. Therefore, luck at this level is very small. A small percentage of what you are lucky with all the (unstable) balls.
Despite this, I tried many times. But after the mechanism jammed on my most successful attempts (2 times in a row), my patience ran out. Sorry I couldn't finish. But the idea is very interesting! If you add stability, you get a very cool level.

@Denis Nazin .. i would be interested in knowing the outline of your gameplay as I couldn’t see it. My wins were shortcuts. Video shows the finish after having collected the high star. Got my heights mixed up in the video.

Spoiler: Finish. Video

https://youtube.com/shorts/clAVU48Ca8Y?feature=share

@Denis Nazin Hi, thank you for trying my level! I agree with you, this level is way too sensitive even to a little change such as an accidental double tap. I was going to abandon this level, but I have refined this level enough to prevent any straightforward shortcut that it's a waste to just throw it away.

Also, @ridgerunner, thank you too for trying my level, never knew there's still a shortcut possible! I want to try uploading my newly made best recorded win attempt on this, could you tell me how do I put it here? Sorry, I didn't understand how to do it .

@ridgerunner It's amazing how you won. Because I see the logic - to make the bottom tunnel passable for B , no tricks. In this case, you need to use all 10 balls! Here is the ball logic:

Spoiler: Foto ball logic

P.S.

Spoiler: route B via internal tunnel

@Denis Nazin .. I misunderstood your comment. I knew where all the balls needed to go but i thought that you had found a good way of doing it! Trying to get the the three side by side balls level was hard and i always managed it by accident rather than by design.