Stink bomb was honestly my 2nd favorite out of that collection (after magnetic rose). I think it was beautifully animated as well as just being really funny.
Crystal is definitely one of my favorite compiled languages. It feels like a happy medium between a dynamic language like Python and something fast but rigid like C++. The only real downside I can see is that the ecosystem is very small and the language is not as popular.
I really like Crystal, and while it hasn't reached a 1.0 yet, it is still great and used in production. I think the main selling point of Crystal is performance + nice syntax. The docs are great and will help anyone curious to learn Crystal along the way. Crystal's biggest problem is that it doesn't have the support of a company or a large base of users so the core team isn't funded as much as they'd like. All in all, I think it is a great language!