squares don't look right

[BopItFreak]

[mounaiban]

It looks alright (but not perfect) from the Gnome terminal, even if the spaces are much wider than intended

This is pretty much a font rendering problem, there isn't much we can do from Lunicode. Even three years later, overlapping characters tend not to work properly. I am yet to come across a particular setup (correctly-prepared font file paired with capable renderer) that does overlapping correctly for all characters.