That story sounds good! I hope we can see it in a future!
About the drawings, I made them all. I do almost all the stuff for my game; excluding French translation, music, and some sound effects.
I'm the programmer, animator, designer, cartoonist (artist), writer, translator (english and spanish), tester, customer support, sales area, marketing, etc.
But at the beginning I didn't had the same skills than now. This is one of my first drawings (first Rex, and Rex's house design):