When I first played the game I was so confused about the button functions. That's why I'm leaving a list of what they do.
m--opens up a screen that allows you to chose what team you want to be on.
n--brings you to the home page
shift--improves your aim, makes you slower
ctrl--improves your aim a lot, makes you much slower
1--brings out your main gun
2--brings out your backup gun
3--brings out your knife
4--brings out your grenades
5- brings out the bomb
tabs--shows game stats
v--opens up radio selections
x--opens up more radio selections
z--opens up even more radio selections
m+9 OR n+9--opens up votekick panel
;--opens up screen where you can modify your crosshair
Tell me if I missed any!