great game. Nice ending. I only wish that at the start there is no colour then colour slowly progresses throughout the world as the music gets happier. This game if you think about it is telling you not to concentrate on the negatives because they will only drag you down. If you concentrate on all the positives for your whole life you will be happy. Also in this game i like that you can go back in time and if you stop walking there is no more sound. (except if you have birds then you will hear a flapping of wings as they fly away.)
that last sentence also reminds me about the two great wars... And a game called valiant hearts which was about the war. This game is telling you to remember what you love especially if they die. Although it is not telling you to grieve constantly
then again if you think about it... The game may be showing how different people react to different things. If i saw an alien sure i may shoot it once... But if it were protecting people i would instantly stop. So this game may be showing certain peoples emotions to certain things meaning it is telling you to not always look at scary creatures or objects as somthing you need to destroy.