Just press SPACE once when it says "Press SPACE to throw a WATERMELON". You can glitch the game by pressing space multiple times... but I would recommend not glitching it out. To fix the glitch simply press the green flag at the top right corner. Also, if you're wondering why the Mom has pink stuff on the beak and feet, it's feet polish (nail polish) and beakstick (lipstick).
Credit to Bearz853 my brother for giving me the idea.