The settings for the game page say there is a WebGL version of it, but there isn't. Only a windows build. Since there isn't any source, I wouldn't be able to build my own, unfortunately...
The GameDev.tv Game Jam 2022 - Free Course For All Submissions! » Entries » The time gate (La puerta del tiempo)
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You might try out some of the settings for optimizing the build.
Code optimization an generation for size instead of speed, or limiting texture sized. Also, in the player settings for the WebGL build target there are some options that are off by default which might help.
(Optimize Mesh Data, for example)
If that doesn't help already, better ask on the Discord...