I like your oscilloscope! But I think it's better to show the result with a LCD ;)
Cool project! It looks similar to this Steampunk Style Award Statuette https://www.instructables.com/id/Make-a-Steam-Punk-Style-Cup/, I like both!
I like your robot! I made a full-direction mini vehicle using AT89C51 three years ago, which was similar to project!
It's really COOL! I think you can also make a laptop with Pi!
Could you control the direction of its advance?