The perspective is still wrong... the cube is almost in front view, so you are not supposed to see its top at all.
You could rise your "camera" and pixel from diagonal top down view (sorry forgot how to call it right) this way the top will appear and the bottom will get smaller a little
the perspective isnt wrong its parallel perspective (dont know how to call it in english) from front/above
SFME (Sorry For My English)
i love the cube [ ♥ ]