https://store.steampowered.com/app/2081230/Parry_Nightmare/
Might look like a Survivors game, but it's actually short and straightforward. Nice music

https://store.steampowered.com/app/1858450/QUIT_TODAY/
Newgrounds-esque beat 'em up, not the most polished but it has solid variety

https://store.steampowered.com/app/2475510/Takoyaki_Surprise/
Point-and-click arcade action game, charming style

https://store.steampowered.com/app/1822030/The_Library_of_Babel/
Interesting blend of cinematic platforming, adventure puzzle-solving, and stealth. Intriguing story too

https://store.steampowered.com/app/1928690/Bionic_Bay/
Limbo on steroids

https://store.steampowered.com/app/1240060/A_Highland_Song/
Hiking adventure game, balances the artsy fartsy storytelling with actually engaging gameplay/exploration well