Super cool idea to have a Runescape-inspired jam game! I did have consistent issues with softlocks in the browser version with all instances of combat, so I unfortunately could not get very far. What I did see however was lots of fun and the interaction with Rin was very cute!
uh oh, can you perhaps go into a little bit more detail with the softlocks? not too much just like a rough version. apart from the obvious the only leftover bugs im aware of is an occasional pathfinding rebuild fail and the funny projectiles not disappearing (new bug)
on second thought, did you perhaps spawn the funny box? only thing i can think of.
Of course, I'll also attach a screenshot just in case it's useful as well. After around 2-5 swings in combat the whole screen stops and I cannot click on anything while the music continues. It doesn't seem like auto fight, different combat styles, or prayers have an effect. The only consistent things besides being in a fight are that around 90% of the time a level up displays on screen during the softlock, and that it happens when my swing is either empty or near empty. I know bug-hunting is one of the trickiest parts of game dev, so I hope this information is helpful! 