There is a game, and it is called Steamlands, and you should go play it.
More? Okay: you’re the engineer of a tank in a sidescrolling 2D world. Your tank is made out of blocks. You put the blocks where you want them to make the tank you want. You use your tank to blow pieces off other tanks. You put those other tank pieces on your tank, too.
It’s quick, its twitchy, its adorable.