video game designs from when I was a kid

These aren't dated, but probably are from 1990 (I would have been 10 or 11). I have a huge folder full of stuff like this.

This is from a Super Mario game I was making up post-Mario 3, pre-Mario World. (click to see the full size)

This is from an original game that was almost definitely called NINJATOWN. I liked ninjas a lot. This one has the feeling of an early Sega Genesis game – but I didn't have one of those at the time, I just saw the games in magazines and was really excited about the possibilities. (I remember renting a Sega Genesis for my 11th or 12th birthday along with "Kid Chameleon" and having my mind blown)