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.

Set in a fictional universe, often (but not always) with fantastic or supernatural elements, alternate worlds, magic and monsters.

A metroidvania is a game inspired by Metroid and Castlevania

It often involves exploration and gaining new abilities to access new areas or progress.