Firefox console is showing me this:
When I check more about this error, I see that the arcade of Construct 3 is using X-Content-Type-Options. What is it? Here is what the doc says:
The X-Content-Type-Options response HTTP header is a marker used by the server to indicate that the MIME types advertised in the Content-Type headers should be followed and not be changed. The header allows you to avoid MIME type sniffing by saying that the MIME types are deliberately configured.
When we say sniffing, we mean protection against unknown websites using the games in the Construct 3 arcade to add them to their own websites not legitly via iframe or similar.
Also, when I check the network responses from my Firefox here:
nosniff is enabled AND it looks like that Cloudflare is maybe implied here by blocking the game with the X-Content-Type-Options enabled.
This error must be asked to the Construct 3 staff since the issue seems to be related to the response HTTP header, which no one can access to it, except the Construct 3 staff themselves.
Good luck :)