Personal Portfolio Page (burger version)

Here it is.
Hi everyone.
This is only my second time building anything on my own, so the code is kind of messy. Maybe, if I have time, I’ll tidy it up a bit someday but for now it is what it is.
Also, I have a slight glitch. In mobile view, when you click ‘Contact me’ nothing happens (unless you scroll a little bit with the mouse wheel). But in full screen view everything works just fine. If you could point out what’s wrong, I would really appreciate it. Also, if it works for you the first time, try clicking through menu links several more times and then it won’t be working.
Oh, and there’s some small easter egg on the page. See if you can find it without looking at the code.
Of course, all feedback will also be appreciated.

Hi, you are using custom javascript code for navbar-toggle and navbar-collapse.

Bootstrap already has implemented that functionality, and your custom javascript is having a conflict with it.

I changed:
[line 12] data-target="#bs-example-navbar-collapse-1"
[line 20] id=“bs-example-navbar-collapse-1”

Now the links are working on mobile, but the navbar doesnt hide, because i changed line 20.

Well, I fixed it, it seems. Thanks for the feedback. If you find anything else that is wrong, please, tell.