[valine]

I disagree. Look at the airplane, it's clearly made in 3D software.

[cakebrewery]

Very possibly. But that would be easily reproducible with layers as well.

Look how there is no perspective change on the rising blocks and the shadow underneath. Blocks just move straight up and down and shadow just increases/decreases in size.

People movements are just tween animations.

[valine]

Its an orthographic rendering, that's why there are no perspective shifts.