Two people in front of a glass, looking at an entity with the halo.

First time designing a shirt; a fun process!

...a halo, and a devil's tail and glowing red eyes. Hm. Line work looks a little shaky in places, but I like the concept. Nerds encounter something occult, and simply must analyze it. (Love the clipboard.) Please do more with this; its a decent start.

Thanks for the compliment!
Well, I wanted to keep this design as simple as possible, so I refrained from adding more details and such.
I guess the line work is indeed a 'lil shaky. I don't think I can edit that now but thanks for the discerning eye. If you were talking about the main attraction, I'd like to think of it as an asset as the inconsistency gives the overall image some consistent variety lol (maybe not a professional look?). Thank you for the helpful comment also.