The one thing that first pops out is the thick grid. The second thing I noticed was that the trees all have the same shading - there's this light patch in the upper left and a light squiggle in the middle. It makes them look like stamped-on trees despite each having a different shape and different trunk. But that top-left light patch is visible on every tree so I saw it as a repeated pattern (but I know it's not). The rest looks pretty good.