strategy game like chess vs a computer, you can go full offense, defend on your own or full defense, hire workers to mine gold for you and collect randomly spawning rainbow pixel powerups to go super mode which removes your cooldown for a short amount of time. the entire game would basically take place with 2 64x64 pixel arts on a battleground with gold and resources
objective, destroy the other's pixel art or completely overwrite it with your own pixels, you can expand your pixel art by creating destraction pieces eg random pixels somewhere on the map or random pieces of pixel art, they act like mini towers that are easy to spread and easy to destroy, the enemy has to spot them, it creates diversity in attack plans.
you can also auto repair your pixel art and auto expand it, the player who wins does so because they use strategy, mined a lot of gold to get upgrades for their workers and strategically coordinated them to go after certain spots of the image, etc, or they prioritized getting the RNG powerup to demolish the other team.