Built my first App - the BOFH returns

So I started to learn programming about 7 weeks ago, learned some Java, immersed myself in git and then via a friend got introduced to android studio. To get some practice I decided to code my own app, and what better way than to create a quote generator for the funny and creative error messages as seen in The Bastard Operator from Hell. Now I wrote the thing, started adding a feature and before I know it, it works and I'm contacting the original author, if I may publish it to the playstore.
Io and behold: Merely 32 hours after the idea had sparked, in an act of spontaneous madness I've pubished my first app.
This was an absolutely electrifying experience and a huge feeling of success to me, to see my own creation on my homescreen.
Sorry for annoying you with this antirant, but I just had to get this out!

Btw here's the link if anyone is interested:
https://play.google.com/store/apps/...

Constructive critisism is appreciated!

For halloween, lets scare the shit out of every Windows user...

Fuck my life! For my studies at University it is required that I learn how to code... Over the past month I've been learning java, and yesterday a friend of mine has introduced me to Go. Now all I want to do is learn Go, meanwhile our Prof pushes us to learn switch-case and goto...

Someone tell volvo, thats not how this works...