Couldn't get past the pong, for whatever reason pong against myself was too disorienting to score above about 350.
The music is decent, the graphics look nice, but would not translate well to a GameBoy screen. The if we exclude the weird JPEG-like background noise, I count six colors easily. The sprites (for Pong) are built for what seems to be around a 250-300 pixel wide screen area. (There's about 4-5x upscaling into a 1000+-pixel-wide screen area.) And there's a bit of anti-aliasing in there to boot.
Functionally, I'd prefer having the option to choose minigames instead of having to beat one to play another one.
The game was mechanically sound, I will give it that. Some QoL, rendering, and sprite tweaks and it'd be right there with a GameBoy feel.