You know when you eat a lot of agars? That totally ruins your score. Here's how to reduce the amount.
1. Use a facebook/g+ account. At level 34, you start at 43 mass so you will not have to eat 33 agars to get to that mass.
2. Hunt as soon as you spawn. This will remove agars too.
3. Use baits. I usually hit viruses to get myself into 16 pieces. When one eats one of them, I eat another virus and kill them.
4. Use 43-mass bots if you can use facebook on them. This will allow you to get more mass and you can AFK as long as one does not kill you. Keep in mind you need to be 53 mass or more to do this. 61 is better if you plan to AFK for a long time.
That's all!