no colour in game

When I test a game that I’ve maid, there is no colour.
Here’s an example.
This is what you see during the game:

And this is what it should be:

Sorry for the big images:/

I reckon you might have inverted normals. Try going into edit mode for the mountains, and press Ctrl+N to recalculate the normals.

If that doesnt work it might be the shading mode your in, I noticed you in the solid mode, press Alt+Z in object mode to change from solid to textured.
Youll see the cube in the bottom left of the buttons header change (you can also manually select different shading modes there as well)