Watched the video, looked really cool, liked the roles reversing mid gameplay rather than as a whole, good job :)
Regarding the error, I had the same issue with the game not running in the browser when I first uploaded, this sorted it for me. Go to: Edit -> Project Settings -> Player -> Publish Settings -> Compression Format and change it to "Gzip". I dont think you can do this now but for future reference :)
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Thanks a lot for your comments. We will also make your suggestion to fix the problem, we cannot upload it now, but we will definitely update it for the future.
It's also not noticeable in the video, but when the roles change, the character goes into hypnosis and loses control. This was something we added to give roles reverse effect. You become the maker of the platform, not the player.
If you want to try the game, the download link is in the comments, by the way. Thanks again.
https://drive.google.com/file/d/1jRayG-GwNQXnXNlqp3Jw9xUnBe4cIsRL/view?usp=shari...