This was absolutely wonderful! Playing this put a big smile on my face :D
At first I thought, this seems very stupid, but after a few seconds, I was surprised at how the gameplay changed, and kept going.
I got more and more impressed, every time a new mechanic was introduced. The sling-shot level was so cool!
If you decide to add more levels to this, let me know! I'd love to try it!
Ideas for other levels: A button that moves along the edges. A button that tries to escape, when you get close to it. A button that glows in the dark, but disappears, when you shine light on it.