The blank expression on this guy makes me think that he was looking for Multiplication Avenue and got lost somewhere along the way. :P
Good stuff! Your astronaut is cemented as the focal point by having brighter and more saturated colours than the non-astronaut civilians wearing beige and brown clothing. That said, I notice one tiny omission that was likely accidental.
The girl closest to the camera has lip definition, but Ece has a smooth line from the bottom of his nose to his chin. Just a little something to add a tiny bit of depth to the bottom of his face is all he needs to show he has lips at that angle, otherwise this is a fine piece.
Keep it up! :D
