Oh no - something went wrong:
Error: Couldn't load project data at path ".". Is the .pck file missing?
If you've renamed the executable, the associated .pck file should also be renamed to match the executable's name (without the extension).
Viewing post in Grapple Pack jam comments
Oh no! This is the first time we hear about this issue. Sorry about that. It works on all the computers we have available to us. If you can give us more details, like what your operating system is, what browser you’re using, and if it happens again if you refresh the page, we can look into it.
Thanks for trying to play the game in any case.