Invaders from The Fourth Dimension

So no updates for a couple days, but haven't been doing a whole lot of anything new until today.

Today I started rewriting my programs... again. Except this time, they're being implemented to work in four-dimensional space. How cool is that? It's not actually as simple as it sounds, though. Namely because, whereas in three dimensions every surface has only one straight line that is perpendicular to it (called the normal vector), in four dimensions those same surfaces have two lines that are perpendicular. Crazy, huh?