Mosaic knitting is really simple in comparison to many other color knitting techniques--you're only working with one color at a time on each row (in this case, it's two rows), and you slip any of the stitches that are not the color you want/need. So, two rows green, two rows black, two rows green, etc.
So, even though it's two colors, i only ever had to worry about one color at a time on any given row, just following the chart.
I also wrote my chart out on a seperate page of graph paper, to include the missing rows and because i didn't have a printed copy of the pattern with me at any point during the making; my computer decided to die a few days ago (Ivan fixed it), and the only web access i had was from my smartphone--and while i could easily read the charts and info from the phone, i got sick of the automatic shutoff it does if i'm not actively using it for x amount of time. The printer is acting wonky anyway; it took a few tries to get it to print the bag bottom template.
I started on the 15th, and finished today; there's probably somewhere around 24 total hours time invested.