Neospector:
Does it fill up your screen?Yes.Then it's fullscreen.Minecraft fullscreen doesn't change the amount of blocks on the screen, it increase their size. Maplestory fullscreen doesn't change the amount of things on the screen, it simply increases their size.Fullscreen is an increase in size of the objects on the screen, it doesn't actually increase the amount of things on a screen, regardless of whatever game you're playing. It only seems this way because most games are infinite (or at least, large and side-scrolling) and thus, it gives the illusion that there is more on the screen than there really is.A kind of fullscreen as you suggest it does not require a few minutes code, it requires a side-scroll when the game isn't in fullscreen, it requires the game to be able to hold more and more particles. This is not a "little" bit of code, quite the opposite. The exact opposite, in fact.
Neospector:
Videogamer555:
Also I know a mod already exists with this type of thing, and I'm surprised it hasn't been added to the official release.