What do the different power ups mean? Is there a special button for them?
H = Health
S = Spread (shoot 3 bullets instead of one)
T = Target (bullets will target the tank you were pointing at when fired)
There is no special button to use them.
I saw you in the matchmaking queue earlier and tried to join up with you, but it looks like you weren't watching the tab the game was running in. Feel free to ping me if you want to battle later. :-)