Hi! Thanks for reporting this!
I cannot reproduce the behaviour you described, unfortunately, so I'm gonna need your help to fix this. First, can you please tell me what browser and OS you're trying to run the game on? Second, if you're on desktop, can you please send me the logs from your console? Like this:
- before pressing "Run game", open the dev tools (Ctrl + Shift + I in Chrome / Opera / Edge / FF, Option + Command + I in Safari);
- find the "Console" tab;
- run the game and proceed to the place where the error occurs;
- note if there is anything red logged in the console; if there is, send me the text of it (right-click and choose "Save as...", or simply copy-paste to some *.txt).