The music was nice but unfortunately I couldn't get past the "Start"/"Credits" menu screen.
The browser console log showed a number of error messages, the first was:
ERROR: (Node not found: "../SelectionUI" (relative to "/root/Menu Principal/menuInterface").) index.js:362:18 at: get_node (scene/main/node.cpp:1326) - Condition "!node" is true. Returned: nullptr
I'm using Firefox which I'm guessing might be the difference to everyone who has played successfully?
A quick look at issues makes me wonder if this might be related (I seem to recall Itch uses an iframe):