That's really cute. I really hope he enjoys it!
The only game I've ever produced is called "Don't eat the Tide Pods" It's a really simple game, you start on an small island, next to you is a sign.. it reads.. there is only one rule, don't eat the Tide Pods... You walk around, and you eventually encounter a Wild Tide Pod; after an extensive battle with it, and you've weaken it enough, you'll be given the option to eat the wild tide pod, or to not eat it. Needless to say, if you eat it, it's game over and you're given text saying you only had one rule. If you choose not to eat the Tide Pod, you get to live and level up! ... it's a vicious cycle... and I haven't released it in fears of being sued.