"GUN MONKEYS is a Procedurally–Generated, Physics-based, Online Deathmatch platform game"
There are many. You start out with a basic gun but '?' crates contain goodies like eg. retro shooter, sniper etc
Basically, you play as a monkey and your opponent is another monkey.
Levels are random. As such, sometimes you get stuck in your base because it is surrounded by saws. It is also very possible for a saw to spawn and fall right on top of you. Killing you outright.
There are a number of servers catered to each region (US, EU, Asia) but you are free to move to any you like.
Both of you fight to the death. It sounds simple and it is. Each match doesn't last long. All you have to do is collect power cubes, bring them back to base and try and outlast your opponent by bombing/shooting him so his life dwindles to nothing.
Sure you get decent jumping and stuff but after a big bomb blast, don't be surprised if your platform literally get blown off.
Yes, it is worth a play but if you have no dedicated friends, it's no fun.