Mulaka is rough around the edges, but once you get over it, you will discover a very enjoyable experience with a lot of heart in it. The game works a bit like a Zelda, where each new zone you unlock serves as a "dungeon", with puzzles to solve, items to collect, power-ups to unlock (these represented by spirit animals) and enemies to fight. The bosses alone are worth your money and time: they are all different, not only in design, but how you approach them as well. Definitely the highlight of the game.
PS: I never encountered any gamebreaking bug. Technically the only annoyance is the first loading screen once you start the game, which takes a lot of time.