For a puzzle game on the NES, this really surprised me. None of the problems with most of them were found in this game, except I guess the lack of rewind, which the Switch Online provided nicely. But the thing that blew me away was the puzzle design. There were some solid puzzles in this game! Enough to keep the lack of mechanics interesting. It was a simple concept, and they took it as far as they could. The graphics are fine, as is the music, but that's not the important part. I very much recommend this game.