Even if your not very good at this game like me you'll manage around 100,000 points or just below every time you beat survival mode (complete level 50). By doing this you'll also get the survivalist achievment too. This achievement takes time and the game can get boring so what I did was play this game 1nce a day for 10 days. Each day I beat survival mode. Then I moved onto other games cause its boring after playing it for an hour or so for me anyway. 100,000 times the ten days equals the 1 mill.
Unfortunetly there's no place to check how many total points you have.