It's a fantastic idea. Very beautiful and a good background music. But my keyboard did not work very well because it mimics the notebook keyboard in numeral pad.
Is your keyboard has End, Del, PgUp/Dn buttons aligned vertically on the right? I completely forgot about that layout haha.
Thanks for your feedback! I will try adding a remap function in the game.
I just added a remap function. If you feel uncomfortable to play with the default mapping, you can now remap it to suit your keyboard layout. Please give it a try if you have time!