Ratcheteer is certainly the biggest game of Playdate's season one, revolving around its story and world while the others focus more on simple gameplay mechanics and loops. Because of this I don't think you'll find that Ratcheteer really does anything particularly unique in the genre, but it is a nice proof of concept that the Playdate can be a place for bigger experiences as well as smaller ones. I wasn't able to finish when I picked this up the first time due to life getting in the way, but I definitely plan on coming back.