Your player Level is a value from 1 to 9999 and is directly related to the score points you made.

The higher the score, the higher the Level.
It is important to understand that the level does not increase linear with your score. When you start playing, even small score gains will result in a level increase. The higher Level the more score points are needed to increase the Level.

Please open the Help (?) menu and scroll down to the Level calculator tool in order to see how many score points you need for a specific Level value

The following diagram shows how the Level value increases between 1 and 1000. Be aware  that It takes a lot of score increase to get from Level 999 to 1000. From 1000 to 9999 the Level increase is linear.