Great picture for its idea. The best part is how the unicorn only appears at the very bottom. I'm always reminded of MLP when looking at unicorns. I think the Grim Reaper's neck might be a bit too long. Maybe that was part of how you shouldn't fear him. That unicorn's so happy.
I love the little things. I just notice there's a hole in the reaper's cloak. You rarely see what his chest looks like. The clouds just seem to overlap with his head. I even like the little black flower...things.