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While an interesting effect, this recursive nature of this game can not be seen unless one has a mouse scroll wheel. I think it would be good to allow zoom in/zoom out to be done a different way (such as page up/page down or +/-). Not everyone has a mouse scroll wheel.

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While this may not work for tablets (?), the vast majority of laptops have a setting called two-finger scrolling that lets you use two fingers on a trackpad to give scroll wheel inputs.

It works perfectly fine on mobile and it feels really smooth :)

What kind of mouse doesn't have a scroll wheel?

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