You could use "If inkey()="q" Then Exit" like you said, but that only lets you press one key at a time (so its not very good for game controls).
I would recommend you use the keystate() command. Each key on your keyboard has a unique key number assigned to it. Spacekey is 57 if I remember correctly. To find out which keys have which values place this code in your main loop.
"Print Scancode()"
This will print the current key number being pressed on the screen. Just press the keys you need to know and write down the numbers...
After that, use keystate in your code to get it to recognize what keys are being pressed...
"If Keystate(57)=1 Then [Fire Bullet]" Will fire the bullet when you press the spacekey.
Well... I hope I helped...
The computer isn't an addiction, its more of a mental and social dependancy.