Hi no Tori: Houou Hen - Gaou no Bouken

Quite a good game based on the famous Japanese anime. In it, you play as a bearded man named Gao who has to travel through the levels, destroying various evils, collecting prizes and fighting bosses. After defeating each boss, you unlock a fragment of a painting. At the end of the game, of course, you have to collect the whole picture. But not everything is that simple. The thing is, in some levels there are secret passages to a parallel level with new enemies and a new boss. It is for the additional boss and gives the piece of the picture that you will miss if you do not find the secret. All the main interest of the game and is to find the secret moves.