I dunno, The artwork looks pretty oddworld inspired to me. I wouldn't be surprised If I found something like that in an odd game. On the other hand, the one on the bottom looks like a giant floating rock that took 15 minutes to make, But while I'm saying this, How long did it take you to draw these?
On an off topic note
Take a joke.
Edit: Scratch that, 45 Minutes
Edit: I'll give you an hour and 9.82 minutes