I have tweaked the wave to be narrow on the lhs which I think has improved the look in balance and to allow a functional toy (so to speak and still yet to be refined) in the back lhs corner - which has been something I have wanted to do in a long long time.

1. What is the toy?

2. What is the function?

Hint for 2. - I don't think it has ever been done before but every game has one.......