Cute premise!
The pixel art and music are neat. The GameBoy Color was my first gaming memory, and your work definitely felt authentic to the console. Enabling all the features of the device makes you appreciate each of them, whereas normally you'd take them for granted.
I think it would've been extra nice if you had incorporated the "built to scale" theme into an actual game mechanic as well, rather than just thematics. But I can imagine it would've been difficult to do so without distracting from your core concept, so I understand why you didn't do this.
Overall, a very amusing nostalgia-fueled experience!