Freezes after showing the tutorial message on the first platform you jump on.
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Thanks for the note! Is this on the web build or an OS build?
The web build is generally ok but does seem prone to freezing at points; I highly recommend one of the OS builds if you can download and play one of them.
I just remembered also: the web build seems to freeze a lot when using Google Chrome. Firefox and Chromium based builds seem to do well, at least in Windows 10 anyway.