If you choose the wrong color button, you will lose half a life point. Make sure you have lots of healing items when trying this. Try pressing green, red, blue, blue. The "hidden" button is in the middle.
RIDDLE - ANSWER Riddle 1 - The answer is a candle, which can be found in the Victory Dogs' Hideout. Riddle 2 - If you ask Alex for a hint, he will tell you to ask Amalia for help. You can ask her for a hint or the answer, which is nails. You can then answer the riddle by talking to Alex again. Riddle 3 - What carries its home on its back in the rain? The answer is a snail. Riddle 4 - Something that has a mouth on its head and eats everything. The answer is a backpack.