I'm building a non profit project and would like to ask some questions

[emelin_2004]

Hi everyone, I'm a 15 year programmer and just for fun I've built a web game using JavaScript and Spotify WEB API.

Problem now is that I'm not sure if it can stay on my website,do I need a written approval from spotify and if so how? 

Players do need to login through spotify if they want to see tracks recommend for them,their profile picture and their name.

I do use tracks audio preview url and their cover arts and I do include easy shortcut to open that song in spotify directly.

I should also say that game is non-profit and i wrote it just to kill some time with my friends,but I would like to have it show on my website under projects which I have done. Thanks.