Game engine: going to puke! "boat effect"

Sorry for the subject title a bit dodgy and unclear.

I could not explain the effect differently!

YOu can download my blend file and PRESS β€œP”.

Use the keyboard up down left right to Move and the Mouse WHEEL UP and Mouse WHEEL DOWN to chnage the angle of view.

The problem:
When you move the wheel the walls are moving strangely, it make me feel sick in 10 secondes, really!!!:frowning:

ps: you can download my source file you will not have the textures as I did not pack it. (not enough space).

Many thanks! :stuck_out_tongue:

Please don’t post the same issue in multiple forums. I’ve locked this one you can keep the other one: