What you see here is a
fully-functional Game Boy game
that you can download here
and play with your favorite Game Boy emulator or play it here below on a Game Boy web emulator.
I've written this game using gbstudio
and draw what you see by hand, and customizing the following asset packs: 1
You can play using the virtual gamepad by touching the screen or a keyboard with the buttons "Z," "X," and the arrow keys.