I feel like the abs shouldn't connect flush to the pectorals. Since the abs are in the chest cavity, there's that little bit of a plane below the pecs where the ribcage is, while the abs are in the rib cage.

I don't know if you're the type who likes crit or not but if not I apologize and this is a great drawing regardless of anatomy :D I am totally jealous of your clean lines and coloring.