The perspective is off, it's too distorted on the side...

Thank you MossyB, I did not pay attention to that, I will fix it tomorrow tho! Much appreciated!

Your drawing isn't in perspective at all, when lines are all parallel it's called an oblique drawing. This should be in the most basic type of perspective called one point perspective, the most fundamental kind and the first thing you'd learn in a basic drawing class. The depth of the cube is visually greater than the height and width making it appear oblong. You can find a basic description of perspective here: http://www.pxleyes.com/drawing-picture/4e615a3dbecaa/B-amp-W.html . Perspective can be difficult but you should find these simple rules helpful.

Thank you Spaceranger! It was my first attempt to draw a cube and I failed!
I will take a look at the link provided and make sure to read it thru, thank you again!