Disc Space. A small 3v3 ultimate frisbee game built in the Unity engine. It's silly and not realistic at all. But had just right amount of learning curve with a high ceiling. Had a little player surge during covid and promptly died. It is what actually led me to playing Rocket League

For real. If he really wants a science center down there. Our city is big enough to warrant two. Especially if the shitty parking, waterfront one is going to be smaller