This is one of the only games that deserve a full 5 star on the Gameboy-ness and that's what it gets. It's also such a fun and addicting game! Its puzzles are really fun to go through. The graphics and audio are exactly like those of a Gameboy game, the resemblance is almost freaky! PICO-8 had a lot of influence on the successful approach to the original Gameboy feel, which is no surprise at all but doesn't take any work, effort and praise from the developer, which deserves a round of applause for such a great job!
Kudos!