ahh sorry about that, and thanks for letting me know! I added downloadable versions so hopefully those will work for you.
Viewing post in A Mermaid's Heart jam comments
Hi. I have seen this error in many Renpy web games and had it myself when I tried to upload one and had a really hard time fixing it. Basically, you have to export it in the right web format (Renpy has two ways to export a web version, but I found only one works), then upload the folder inside the generated folder for it to work. I posted my solution in the NaNoReNo jam chat and will paste it below in case you are curious.
"It took me a while to find instructions on how to upload my Ren'py game in a web format itch.io recognized, so I thought I would post this for anyone else who might be struggling. It worked for my version, 7.3.5. and was recommended here: https://itch.io/t/1055894/how-to-embed-a-renpy-game-to-my-page.
In the Ren'py launcher, click "Web(beta)," then click "Build Web Application". Under your game folder should be a folder called "[your game]-1.0-dists". Inside is a folder called "[your game]-1.0-web" which contains several files including index.html. Zip "[your game]-1.0-web" and upload it to itch.io as an HTML game.
Hope this helps anyone going through what I did."