[OFF-TOPIC] Challenge me!

Question

I want your ideas for a new program.
Since it should be a challenge, it should not be too easy, but it should not be exaggeratedly difficult to make, even though I already did some pretty advanced stuff...

Answer 1

//take challenge/assignments available on SL accn to your wish

Answer 2

A chatbot would be really cool.

Answer 3

https://code.google.com/codejam/contest/3264486/dashboard#s=p1