Really unique idea! But if I had to be picky, technically the object is falling through a 2D plane, and we are 2D beings. If it was 1D, we would only see a dot. But as a game, its good!
Yes but a 2D being only sees in 1D at a time.
The way I understans it is:
Dot is 0 dimensions since it has no width or length.
A line is 1D and a square is 2D ... etc
I'm glad you liked it and thank you for playing!