Thanks! So happy you enjoyed playing. The controller is essentially the default asset provided by Unity along with a fair number of my own modifications. And yeah, I know having the different ammo isn't as obvious as I'd hoped. But the latest update of this game includes information about the different ammo types, such as how many there are and what each one does differently. I also added a dynamic crosshair you can toggle on and off for convenience.
This is the third game project I've ever "completed" and made available to download, but there are a couple more that I've had in the works for a little while. I started teaching myself how to code and create games since about spring of this year. But for what it's worth, I've essentially put all of my time into learning everything I can. My plan is to release my first full, premium game by summer 2018.