Co-Op is a space shooter with no shooting. The only way to kill enemies is to cut them with a flexible power beam connecting players' ships. The goal is to max your score before you inevitably die due to your partner's mistake.
The game features several types of lovable enemies, cute cardboard aesthetic, combos, and many ways to break a friendship. It's pretty fun and requires some good coordination between the partners to be any successful. It's also possible to play it solo, if you are ambidextrous enough.