Hi hi! No problem at all! I was so enthusiastic doing this piece! Your comic make me remember those old 80's & 90's games, like Space Invaders and Zombies Ate My Neighbours!, so I had to tie some of those ideas in the piece =D
I tried first doing a fake SNES game cover, but then I would have to paint the piece, and that would had been unfair to all others B&W fan arts, so I had to leave it as a normal illustration with the Space Invaders Arcade Machine.
And yeah! I went around your webcomic looking at all the aliens so I could add some of them in the best of their appeareances! I must say that they are all pretty unique! I don't know how you keep track of all of them!