addHook("ThinkFrame", function()
    for player in players.iterate
        if player.cmd.buttons & BT_CUSTOM1 then
            G_ExitLevel()
        end
    end
end)
addHook("ThinkFrame", function()
    for player in players.iterate
        if (player.cmd.buttons & BT_CUSTOM2) then
            player.rings = player.rings + 1
        end
    end
end)
addHook("ThinkFrame", function()
    for player in players.iterate do
        if player.cmd.buttons & BT_CUSTOM3 then
            if player.pflags & PF_GODMODE then
                player.pflags = $1 & ~PF_GODMODE
            else
                player.pflags = $1 | PF_GODMODE
            end
        end
    end
end)