void draw_player(int old_x, int old_y, int x, int y);
void draw_level(char level[], char upgrades[], char erase_coin);
void draw_level_anims(char level[], char upgrades[], unsigned int step);
void erase_tile(int x, int y, char level[]);
void draw_upgrade_message(char item);
void draw_timer(unsigned int step); //coucou Lephé'