What stage you're at in your Unity adventure (which tutorial video are you on, or if you're on the second assignment, which step are you working on?).

I am starting the second one

What challenges have you encountered so far?

 Bugs of saving the fills restart the project 4 times but I actually finish the first part finally xD

What's the most interesting thing you've learned so far?

 Use unity is not so hard if you learn the specific commands/codes you save your time, work more faster. Oh and save every time your fills when you did something new or there are going to be lost forever ( I had the experience severals times xD   )