Remembered this game from my childhood, always fancied the music while going level from level, so why not make a remix of it . 
This is what I call a "smooth" techno version, with a standard 909 kick and hi-hats claps with some effects and a bassline.  
The melody is done with three different synthesizers with a old school touch. 
Enjoy 
Link: Tadashi Kimijima - Bubble Bobble Theme (Nixim's Smooth Techno Mix)