Fun Fact: The creator of A Boy and his Blob is David Crane, the programmer and designer of Pitfall! , one of the most beloved games ever designed for the Atari 2600 console.
A Boy and His Blob was part platformer and part puzzle game. The player controlled the Boy, who was trying to get an alien named Blobert to its home planet. By feeding Blobert jellybeans, the Boy could transform it into various objects, which allowed the Boy to navigate the levels.
Exploration was a big part of the game, giving players plenty of time to experiment with the Blob's various shapes. This is considered one of the strangest games ever released for the NES.