I really like the clean design and interesting idea. I would like to give 5, but I can’t because of one small detail: Why is FD needed at this level??? It is absolutely not needed! But because of it there is a shortcut, can be defeated with only one FD (I was even able to take the star inside with the help of FD). If it weren't for FD I would have given it a 5.
What a great design! If only I could solve it. Visibility is hard to see through the gaps with B. I once got him out to the pool area but couldn't go any further. Another time he rose up on a block only to fall off inside.
@Pedro Andrade thank you! I didn't see that slider under the water. You might want to check the sound on that video