Thanks Toucan in the Discord pointed the bug out to me. It's a framerate issue. They miss their cue to stop. It can be solved by lowering the quality setting (pleased I remembered to include quality settings now). I was suprised the webGL worked at all, usually it mangles my games but I was pleased I checked as it was painless. I have now put a note in the description and will make the logic that stops them walking a little more generous. I am pleased you liked it. I enjoyed rolling about in yours.