Sometimes you just want a simple, classic arcade action. Anyone remember Arkanoid? Or any other type game... Strikey Sisters just came out on a few days ago and looks like a really fun blend of 2 player co-op with upgradeable bits and other unique elements that really add a lot to the traditional formula.
https://www.youtube.com/watch?v=13ZfapYU6fw
http://store.steampowered.com/app/643880/Strikey_Sisters/
357w