a question about TOEFL® Discussion part 2

[Rustem9090]

Hi dear friends and teachers

I am a new member on this website and I can say that I really like and enjoy learning new things about english.I have been following the E-mail course of this website.

While I was listening to part 2 of TOEFL Conversations ,I just came on a sentence and I couldn't understand what type sentence it was .

Here the sentence below

--------University's just too much fun, I guess. ---------

what does that mean ?.It looks like an incompleted sentence but I need help anyway.