As far as I remember there weren't any graphic errors, but what I saw was only a screenshot.

I don't remember who posted that though, I'm sorry. It'd be a good solution for your sight though.

I played through on Hard, it was hard as heck. =O

The boss doesn't work very well, he often stands in the air which looks odd.

Maybe you could make a 1 tile wide platform on every second tile? (or every third one if Bilsy still stands in the air)