QUESTION: WHY DO PEOPLE SEEK SALVATION? WHY NOT CONSIDER- "LIFE IS LIKE A GAME, LOVE TO PLAY & HOPE IT DOESN'T END"

Above all of your questions, we all know, Life will end once our time comes. So, whether you play, you enjoy, you make friends or whatever, IT WILL END ALSO, EVEN THE HOPE (referred in the question).

And you are only thinking of positive things, life also shows us the negative part of it, like death of beloved ones, health ailments, troubled relationships etc.  The word you referred “HOPE” actually doesn't exist in case of Rebirth, means you cannot be millionaire or king in next birth if you hope.

If all the positive things you mentioned get converted into negative one, you will feel sad, but Salvation or say when you walk on the path to achieve the stage of Salvation, you will be untouched by sorrow & grief. I mean, your mind will know the fact, that everything in this living world is materialistic and will end up for sure. But we do not have to grief or feel pain in that cases which may occur from time to time.

Salvation is the stage by virtue of which we will get rid off from the process of Rebirth.

Salvation (Moksha)

 I mean, everything in this world will end, So why so materialistic about it.