Okay :-)
Free browser games:
https://gsgames.itch.io/solar-blaster-challenge-stage
(Short Pico-8 high score shooter)
https://eriban.itch.io/bumble-bots
(Very challenging action puzzle game)
https://paulsgames.itch.io/trading-with-werewolves
(High score action / trading - one of my games btw)
https://paranoidcactus.itch.io/ufo
(Short but great Metroidvania)
https://1029chris.itch.io/toxic-invaders
(Juicy Pico-8 shooter with excellent sound)
Paid, but worth it!:
https://inarisoft.itch.io/micro-dash
(Incredibly deep retro Boulderdash metroidvania variant)
https://vlambeer.itch.io/nuclear-throne
(A juicy action rogue-like - you can waste hundreds of hours on this game alone...)