I think clearing the cache on your browser is the only hard reset right now. Once I add save slots people can manually reset their progress.
Either that or I will reset each patch, and make a downloable version if people aren't ready to update yet. Thanks again, for reporting the bug.
EDIT: I found the best new short term solution is opening this page in incognito mode/private window to force a reset.
- Let me know what would be the better move for the next patch.