I'm getting nothing from the browser version (latest Chrome and, ugh, Edge): nothing rendered, no sound, and just the sound with a black screen from the executable. Seemingly, stuff is reacting in the background there. Fairly fresh install of updated Windows 10, no issues in terms of streaming any other game on itch. Very odd. What do I need in terms of dependencies?
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Create an issue over on the Github repo and make sure you paste your console output into it. Good chance it's your hardware being out of date.