itch.io

Dude. This is a browser game. You can play it at the top of the page.

It's made in Pico8 that exports games ("cartridges") in a special png format. So if you want to open the game in Pico8 you can download it instead of playing the web version here.

https://www.lexaloffle.com/pico-8.php

Somebody that knows how Pico-8 works, and realizes that the game's code is embedded in the png, which pic-8 expects you to load into it?   Most people would probably just play it in their browser though...