I run on Chrome
OK, that means it’s not an issue with the zip file. My second best guess is that it’s caused by all the old, deprecated im.Crop() operations in chara.rpy.
TL;DR: there’s no actual infinite loop — just a lot of computationally expensive operations happening at once. The browser gets no response, panics, and throws a “possible infinite loop” error.
This is something I could fix relatively easily, so even though we’re just six days from the rewrite release, I decided to upload a quick fix. I only had time to do a very, very quick check (basically launched it and saw that it works). Let me know if it works — in which case, yikes! First bug report closed!
If it doesn’t… well, the good news is that the rewrite is coming out in a week (actually less than that, since the clock just ticked past midnight here). I hope you’ll be willing to bear with me and give the new version a try when it’s out!