Thanks for the feedback!
Yeah, I think the inconsistency is due to some lag in the WebGL version, it felt a lot snappier when running in Unity itself. I think I just did a poor job optimising for running in the browser, and by the time I realised it was too late to fix all that. First time doing a WebGL build, so plenty to learn!
Sorry about the soft-lock! Did my best to avoid it but it happens.
Thanks so much for the feedback!