Fun fact: browsers' devtools consoles have de-facto standardized convenience aliases for querying the DOM, similar to jQuery [0][1][2][3][4]. This means you could do something as simple as:

    setInterval(()=>$('.main-btn')?.click(), 0)
    setInterval(()=>$$('.upgrade')?.forEach(_=>_.click()), 1000)

to create the simplest dependency-free cheat speed runner. (And, as mentioned earlier, shrinking -- or logically also zooming in -- the page results in more DVD bounces.)

[0] https://devtoolstips.org/tips/en/query-dom-from-console/ [1] https://firefox-source-docs.mozilla.org/devtools-user/web_co... [2] https://developer.chrome.com/docs/devtools/console/utilities... [3] https://learn.microsoft.com/en-us/microsoft-edge/devtools-gu... [4] https://developer.apple.com/library/archive/documentation/Ap...