Orange House Escape

After a large man-made disaster, you and another group of scientists went to explore the forest, which is very affected by the radiation. You settled in the orange house, very similar to a huge orange. The next day your group went to another place for taking measurements, and you are left to look for mutated animals in the forest. But after a few kilometers into the forest, you find that everything in the forest wants to kill you, and the keys to his lady you are lost.