2 of 3 'absolutely' doesn't add much emphasis.

Why texturing in game engine looks different than in render mode?

I am learning Blender, and at the moment I am trying to create very simple game. The point I am stuck at is texturing problem. I have created a simple maze and added two different materials for floors and walls. Walls are supposed to be white, and floors a bit blue with cloud texture. The look I got in render mode is: enter image description here

And in game mode it is:

enter image description here

Why is that? Are only UV textures available in Blender game engine?

Thanks in advance for answers :]