Being

The evil Zargon has captured Being’s friends and the magical star pieces.
Somehow this will enable him to rule the galaxy, so Being has to stop him.

Being is a traditional side-scrolling platformer. The player character can
move horizontally, jump on platforms, collect coins as well as keys. The
latter are required to open same-colored doors. Enemies can’t be defeated and
have to be avoided, otherwise one of the three hearts of life energy is
removed. At the end of a level waits one of Being’s friends and a star piece
to collect.

Being