Although there are some "alternate endings" you probably didn't plan for, this is a good motion plane puzzle that requires a deft touch. Nicely done.
This puzzle has a very quick (unintended?) solution. Spoiler: Shortcut? Throw B off the structure and let him climb on the little platform above the water. You can then easily throw B to the win. This final step was probably intended.
The whole structure is a bit wobbly but it is also doable to reach the win without shortcuts. It is very nice that you do not have to start from the beginning if B happens to fall.
