Duolingo is a work in progress. They've added a lot of new lessons recently, and I'm sure they will continue to add more.

I'm at level 14, have 8621 points. I see on the list of people I'm following that the highest one has 13600 points and is at level 16. So, I guess that there are at least 17 levels now.

Thanks! I was afraid it would end once I reached the end of the flow chart I saw. Was wondering whether I should have a plan B ready so I could continue if that was the case. Thanks anyways!