I think it behaved a little funny.

If you're talking about the ending, there's always things like that that may screw you over during a run. Not sure if I see it as a glitch though.

I found the behavior at 0:39~ and 1:23~ to be odd. I included the rest of the video because it may be useful in trying to reproduce the rest of the video. If 0:39~ can be reproduced and handled freely, it might be useful in lev12.

I see now. It might be something to look into.