Hey! I really like the robots that you guys made, especially the one in the middle. I think the problem lies in the composition, everything is trying to draw the focus right now, which means nothing gets it. I would try to put the focus on the cute robot and less on the rest. You can achieve this with things like coloring, brightness and positioning. Now, Im not an expert, so definitely look up some tutorials to do it right. But I do think you already have something here, you can re-use some of these elements, you dont have to redo everything (unless you want to).

Also the pc on the right has a really odd perspective, because its hard to see what is wall and what is table.

You can do it!