Small island

inside the box.

Spoiler: Shortcut

Springboard Stairs to the win - forget the 2 back balls and zapper!

Played a few times and still a bit unsure of B’s zappability.

Why did the giant box disappear?

@DDT Popper The game bug. put 3rbot and put they turn different direction and use the metal to
connected they together.

Interesting effect!
I solved it using a trick (big shortcut). I wasn't able to cross the zap yet...

Spoiler: Shortcut

Springboard Stair

I ignored this level initially due to the boring box, but @chemi pointed me to this level. Liked the way to return.

Finally solved. I was not sure about the right rating. I was thinking between three and four because the shortcut and because I was able to cross the zap in both directions randomly...
But finally I decided four stars because the main idea was original and the visual design was nice.
Thanks!

Note: Although the box is a nice effect you will loose many players because the card is not really attractive.

Great intended solution but that shortcut is an issue...Anyway I had fun when I did it right!! Thanks for sharing and well done @TW.W.G