If anyone is interested, I figured it out! Thanks to THIS tutorial from Marlowe Dobbe, ledoux, and the whoever made the Museum hack!
How to start a second bitsy game when another ends
Step 1: Put the html files in the same folder.
Step 2: Rename them something easy (I did index for the first game and page2 for the second game).
Step 3: Add an ending for the first game
Step 4: In the ending dialogue for the first game, only place the text for your file name (without the “.html”)
Step 5: Download the game and open it up in an html editing tool (I’m using Visual Studio Code). Rename it “index.html”
Step 6: Find the following block:
if (end) {
startEndingDialog(end);
}
And replace it with this:
if (end) {
window.open(dialog[end.id].src + ".html", "_self");
}
There you go! Open you index file in your browser and it should work!