3D Points

Alright, so this is my first 3D simulator (Many thanks to Builderboy2005 and his Rasterizer scenario :))

Not much at the moment, just 3 points of different color at different locations in 3D space.
Controls:
w: up (+y)
s: down (-y)
d: right (+x)
a: left (-x)
e: in (+z)
q: out (-z)

Fairly simple to understand: the circles represent the distance of each point, so the larger circle means the point is closer, and the smaller circles mean that the point is farther away. I don't know why the circles warp when they reach the edges, but I hope to fix that soon (z buffer algorithm is flawed)
I may add some more later ;)

EDIT:
Crosshairs added
New blue point added which moves using t,f,g,h,r,and y!