Speedrunners, a game of reflexes and grapple hooking your friends.
You really should get this game, honestly. It's definitely worth the friend rage. Also, the only issue I have right now would be the blast zone lines aren't transparent, which they should REALLY do.
Speedrunners is a game of running around a big map, grapple hooking your way to first place. Of course, it's only possible to grapple white ceilings, so the majority (unless allowed) of the map is going to be running, picking up item boxes, and trying to get to first place. What you have to do is make sure you keep on running til you can't. By that time you've hopefully won your first round. The game is in Early Access right now, but it's getting a lot better! The controls are also configurable and it's really best with a controller.
The items while not that plentiful are actually really fun regardless. You have rockets to shoot at people, EMP blasts to destroy: grapples, golden grapples, boxes, and also rockets; invincibility shield drill which protects you from harm, golden grapples which hook onto the closest player in the direction you face, and 3 boxes.
Speedrunners also has a nice twist to it where you can choose different modes to play. The most frustratingly fun has to be the mirrored track mode. Rapture just shoots rockets everywhere, lethal spikes, all X (X being either rockets or golden grapples last time I checked), and there may or may not be another I'm forgetting at the moment, but that's the fun of this game.
tl;dr Speedrunners is a REALLY fun friend rage-inducing game that makes you want to keep trying to aim for the top, but also can be played casually enough for fun.
I'd give this amazing Mario Kart-esque game a 9/10.