This game was made on the Pico-8 (https://www.lexaloffle.com/pico-8.php) which is both a “fantasy console” and a development environment. It has artificial constraints such as 128x128 resolution and a 16-color palette, so it definitely looks better on a smaller screen. You can create games that are two-player, but ours is only single-player.
You should check it out! Everything is written in Lua and they have a great toolset for creating sprites, maps, sfx, and music.