If you dont know what Anti-aliasing is, just google it.
Yes, i know that this game is meant for slow computers, but that doesnt mean that it cant offer the special amenaties that good computers can handle too. So why not add an Anti-aliasing option that is off by default? Now im going to get a bit more specific in this little text diagram.
Key: "@"=option without suboptions. "*"=main option or option that has sub options. "--"=sub options. "-#"=option located in the subotions that has more sub options.
@Anti-Aliasing <on/off>
*Extra Anti-aliasing
--Quality <2x/4x/6x>
-#Entity AA <on/off>
----Quality <2x/4x/6x>
-#Block AA <on/off>
----Quality <2x/4x/6x>
-#Image AA <on/off>
----Quality <2x/4x/6x>
just an idea. Also note that the top AA button automaticaly should probably enable all at 4x. All the extra setting should be there for people who can run some AA, but not all of it, or to maybe set block quality to 4 and everything else to 6, or what ever numbers that may end up there.