Actually, the controls were allowing to turn 180 d. at the beginning of the project, but it was bringing some design problems with the time mechanic so I decided finally to lock it.
Yeah, regarding the final part I agree its not interesting at all... My idea was save some time and put the player at the beggining to play again if he wanted. But I'll be changing it in the future! :D
Thank you very much for your comment Jorava!