Loved the graphics and overall vibe of this game! The day>night cycle representing the timer was a nice touch. My one issue is I think it should show you your finished work on the screen where it shows your profit - I wanted to screenshot my crappy artworks but I didn't have time if I wanted to submit them in time! Maybe a number aside from the money amount could be helpful to better judge your artworks too? (e.g., "86% match", so you know exactly how well you replicated the artwork, as this isn't so clear from the money amount)
I think you could easily build on this in future by adding a few different tools (different sized brushes, spray paint, ruler for straight lines maybe?)
Overall great submission!!