Nice idea! Really like the concept!
I'm curious about the focal point. Is it the reaper or the flowers? The people are looking down, as if they don't see the reaper, so I'm assuming it's the flowers (otherwise I know I'd sure be looking at the reaper instead
).
Just taking a bit more on what @phoenix-yip said, I think I'd try to either back the reaper up slightly so that the 3rd person had not yet had his flowers cut down, and maybe that final third of the design would be a bit brighter/more colorful to really bring home what's happening (maybe hes more neutral and not as sad as the others). Or extend the scene and put the reaper after that 3rd person to bring home the point that all the flowers are gone.