Hi, and welcome to my Itch.io page. I develop games as a hobby.
Most of the games here are probably for and from game jams. Game jams are time-constrained events where people develop games under time constraints (48-hours, 1-week, etc.)
My favorite tool of choice is Phaser. It is an HTML5 game development framework. This allows players, like YOU, to be able to play the games in your browser without having to install any plug-ins, or download/install software.