itch.io

Uses two-dimensional "sprites", 2D images created and used on a flat plane, as opposed to the three-dimensional models or environments found in 3D games.

A popular game from 2013 where you must tap a bird to dodge pipes. Many clones & fangames were made because of the original game's success. 

Global Game Jam is a yearly game jam where developrs from all over the world are able to participate in teams to create a game with a shared theme.