Hexlikes are games inspired by Super Hexagon. I would define them as: - Simple concept - Controls are usually just left/right buttons - Core mechanic involves rotating - Twitchy - Very difficult - Endless - Simple execution (usually no powerups, upgrades, 3 mission system, etc.) Some examples: Super Hexagon Boson X Duet Pivvot Project 88 Impossible Road and Expander don't meet all the criteria but I've seen them compared to SupHex anyway. What are some others?
A couple of my favourites which are lesser known are: Gauge - Game by Game Atelier infinite by Nexus Game Studio.
I know it doesnt really count here, but I would like to mention Polara for meeting most of the requirements, missing only "Core mechanic involves rotating" as this is more a runner than the rotating types. Reason why i wanted to mention Polara as well, is that some of the games are basically pseudo-2D runners as well, like Duet and Pivvot.