I've made a little tool (for personal use, but I figured it might be useful) to sport random ideas. https://yaru.itch.io/yals-game-idea-generator
The basic idea is that it combines text from a bunch of random tables (concept, twist, and some flavor text), and I've tried to keep the text bits kinda sensible (most other idea generators I've seen has focused on being 'random' in the "OMG MAKE A GAME WHERE YOU ARE AN ICE CREAM THAT FIGHTS MERMAID" sense, and focus on setting instead of gameplay).