Loved the rollercoaster of emotions lol. There's a pretty active Stepmania community so if you're interested in DDR style games you can get thousands of community created songs/beatmaps for free and make your own controller for ~$30 USD.
Here's the basics but if you're interested in a new project there are people who have posted guides and the code to get LED dance pads and whatnot. It can be as simple as just having a piece of plywood with sensors and buttons but will be as good as an arcade dance pad, or you can go all out like this guy


