If we talk about games that are inspired by original ones, this one is a pretty good example! Like it was already said, it's a pretty nice, accurate interpretation of the already existing concept of moving boxes to specific places!
Although, like also mentioned before, the difficulty curve could be improved a bunch! I felt myself already struggling a bit in the beginning levels of the game. The art and sound are simple, yet clear and nice! And it feels very Gameboy-ish!
All in all, it's a really nice homage to the original, so good job!