Controls feel pretty good, and I had some fun with this one.
I like the idea for the robot voice for tutorials but it seems to be louder in my left ear and that kind of bothered me, (and as others have mentioned they tend to overlap sometimes. )
Also I I guess the only way you know what the generic barrels do is to listen to the tutorial, which I promptly forgot and then wasted my only barrel on a missile when I needed cooling.
Maybe some sort of 1,2,3 display on the UI would help there, or make it so the barrels arent instant? Maybe make it so holding down the button slowly takes fuel from the barrel to cool you, or restore health - or you have to hold the button to craft a missile which consumes a full barrel - so you dont instantly waste it..