There seem to be a few more glitches. If the box the ball is trapped in gets too small it sometimes passes a box boundary. (I am using chrome.)

That's good; it means if you make a mistake you can box your way out of it.

The OP posted 45 minutes before you with a very polite and open message which describe the problem you have stated and also provided a rationale for the project AND a link to github. Why is it good form to just wade into a comment thread and give unconstructive criticism in this circumstance? Why not just quietly open a github issue?

Fair point - I was just making an observation really.

What the... Chill, I mean, the guy just pointed out a glitch with the most non-threatening neutral declarative sentence possible. Why is "good form" to post a reply like that?