Reflection on The Great Gatsby?

The Great Gatsby is a reflection of the American Dream. Gatsby's life goal was to get enough money to please Daisy. In the end, though, Gatsby was killed due to Daisy's (fatal) mistake, and Daisy and Tom went about life as though nothing had ever happened. My interpretation is that happiness CANNOT be bought with money, and Gatsby's death is furthur proof of the superficial realities of the American Dream. That's how I saw it, anyway. I hope that helped.