Legally Distinct Emergency Dog
My nephew is, or at least was, a big fan of a certain terrible dog-based copaganda show, and his favourite character is the firefighter dog. This is a game about being a dog and putting out fires. The fire engine has a hose and a ladder, and the dog has regular platform controls. There are some gentle puzzles to solve to reach the fire.
Since he was not for the most part very good at playing games on his own at this point, this game was intended as a two-player asymmetrical couch-co-op game, with one player controlling the dog, and the other controlling the fire engine. (In his play at the time, it was common for a character and their vehicle to operate almost completely independently; I have no idea if this is based on anything in the show because I refuse to watch it. If we’re watching children’s TV in adult company, we’re strictly a Bluey family.) This didn’t really work because I didn’t have a gamepad to hand, so both players are on they keyboard and it just became one player controlling both characters with different keys, which was absolutely fine. The version embedded above works slightly differently — you control the dog and get in and out of the fire engine to drive it. The kid doesn’t like this as much, I think just because it’s not the first version I showed him, but the mobile web embeds of Pico-8 games don’t support multiplayer, so it’s the only version that makes sense here. Both are downloadable:
For some reason, the two-player version of this game has a speedrunning mode in it. To my knowledge nobody has set a time yet.