A picture with a bit better quality is over here:

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(click on the image to enlarge it)

Interesting little comic there.

So the cat touches the leaf, and then grows wings? I want a magical leaf!

I do not think he touches the leaf, i think it is a depiction of this:
If there is a will, there is a way.
Meaning if he really wants the leaf, he will do whatever it takes to do it. and it can also be saying to never give up(, trust your instincts(Random Star Fox quote ^^).