Loopz © 1990 Mindscape, Incorporated.
It's really very simple: you get pieces of different sizes and shapes. Then you have to fit them together to form complete loops. It's so simple, in fact, that most people can easily finish their first session in... oh... five to ten hours. But by then you're addicted.
GAME ID: NES-L8-USA
Released in October 1990 in the USA.
Game's ROM.