This is a real 3D mobile game you never played.
Change the focal length of your eyes you can see 3D images without 3D glasses.
Because the screen size will affect whether you easily see 3D image.
In our test, few people cannot see a stable 3D image on iPhone.
If you cannot see 3D image, please try play on 2D.
Because you look a 3D image, but the screen still a flat 2D.
So, your eyes position will effect the touch position.
If you find your touch will shift right, please a little move your head to right.
Starter -- connect a pipe from left-top to right-bottom to complete a mission
Advance -- connect a pipe in 60 seconds to complete a mission
Professional -- connect a pipe in 60 seconds and must use all of fixed-pipe to complete a mission