18 * This can be "grow", "fireflow" or "iceflower" at the moment
20 virtual void set_bonus(const std::string& bonus) = 0;
22 * Make tux invicible for a short amount of time
24 virtual void make_invincible() = 0;
26 * Give tux another life
28 virtual void add_life() = 0;
32 virtual void add_coins(int count) = 0;