Buttons

Three times a charm - thanks. BTW, after attempting the first ones, I wasn't expecting a few things with this level.

Nice logic level, although more difficult than previous version. Thanks!

What you said that cpw said

Nice puzzle. This was more challenging.
Great design and excellent use of the trick. Thanks!

i can't solve it, anyone can give clue

@meko yes

Very nice logical level with a minimalist and exquisite design...

Great level. Impeccable logic as usual.