Gun Idle is a very addicting clicker where your only real objective is to beat your own best record as you shoot off a huge variety of weapons. If you're looking for a clicker without too many functions and with the very simple objective of beating yourself -- this is it.
As the story goes, on this weapon-clad adventure you're the CEO of a weapons manufacturer. Your main aim is to build and mass produce increasingly destructive and expensive new products for your consumers. Starting out all you'll have is a tiny pistol that earns you a couple of points whenever you aim at the target. But, tap your screen as many times as you can in order to earn more money, and eventually completely destroy your target to amass a small fortune.
Once you have enough money, try to invest some of it into developing a new kind of weapon to continue improving your aim, and earn more spare cash. Keep in mind that even though the upfront cost of innovation is steep, you'll earn more in profits by selling increasingly more expensive (and lucrative) products.
Likewise, one of the main aspects to keep in mind in Gun Idle -- you won't just continue discovering new weapons -- is that you'll also need to level up your factory. Once you invest your fortune in improving weapons development, that is. Head to the top of your screen to check out what level you're currently at, and how much you have left to achieve that improvement. Tap on screen non-stop in order to earn more and more money and show off your skills to get as far as you can in this frenetic weapons factory game.