Adding to my previous comment, I have a problem with resolution. The resolution chosen is really weird and doesn't scale up to any conventional resolution. Vertical resolution is 192, when 180 would scale well to almost any resolution out there. When the scaling is non-integer, the pixels in the game change their shape, which causes shimmering effect.
180 and 360 scale well to most monitors (except mine which is 1600 by 900 which doesn't like 360). Another way around crooked pixels is smoothing the image (which isn't a good option)