Pico Wars is a remake of Advance Wars utilizing PICO-8.

Unfortunately, due to the limitations of PICO-8, I wasn't able to add AI to the game, instead you'll have to bring a friend along to play. Each player must be on their own controller. 

The default controls for the web version are:

Player 1: 
Movement: Arrow Keys
Action: Z
Back: X

Player 2:  
Movement: E,S,D,F
Action: W
Back: Q

If you own PICO-8, the cart can also be found on the BBS https://www.lexaloffle.com/bbs/?tid=30921