I was able to see the spy, but it took me a second to distinguish the figure from the "lines"
Also try to make possibly another line behind his shades (to the right) to give me the shape of his head. For some reason I feel like he needs it. You don't have to keep it, but it's something to take a look at.
obviously i'm not at the same level as you, so i find your pen-tooling quite brilliant
the only draw back i find [OUT OF THE EDITED VERSION] is the text and speech bubble, which is alright, but doesn't really flow with the picture, i think the speech bubble is too tall for the text? maybe a thinner stroke around the bubble too.
But otherwise it looks great