Pico-8's restrictions and intentionally limited color palette and sound editor give its games a certain level of charm that you don't always see. I've been trying to hunt down Pico-8 games. Here are a few of my favorites so far:

Air Delivery

by @pianoman373 https://ldjam.com/events/ludum-dare/53/air-delivery-1

Elite Delivery. Pizza Dangerous

by @boddiul https://ldjam.com/events/ludum-dare/53/elite-delivery-pizza-dangerous

IceCream Van

by @notnasiul https://ldjam.com/events/ludum-dare/53/icecream-van

We've made several games in the past in pico-8 which is always a blast! Even after deciding to try out Godot this game jam, we still ended up going back to a low pixel, limited palette style. We even found ourselves going back to Pico-8's chiptune music editor for the game music! (Check out our game, Rail Blazer if you haven't already) . I'm sure I missed a bunch of other great pico-8 games. Please link them so I can give them a play!