Hmm.. yeah, the zen mode would be cool. I like the gamefeel of jumping, falling, and dragging a web. It's good stuff, would work well with a chill out mode.
I couldn't find a donate button for the game--did I miss it?
Excellent job! I played this and my 10 yo son did too. We both really enjoyed it.
I'd love to play this in an arcade machine with an arcade stick!