Semester 2 - week 6 - Line & Perspective - capturing right angles

This landscape drawing has its focus on the perspective and angles and it's representing an interesting building with an oblique front.
It was made with 3 grayscale markers and with a black pen. The perspective is with 2 points and the depth is represented with the gradient towards black in he back. Also I wanted to show that the building is illuminated from the front and I represented the glass using some variations of the grays.
The angles could be improved because now it looks like it's falling back maybe because the line in the right which is supposed to be straight isn't and it's not too visible.
The horizon could be seen on the left where it's a line just near the base of the building, and the focal point is the middle of the building where it's a really strong contrast between light/shadow. All the lines are driving the eye in that way which helps emphasizing the focal point.