I don’t have another lisp to properly compare Janet to. I believe it’s a Lisp-1, but I don’t know for sure.
For me, the thing I’ve liked best about Janet is that it is expression oriented, like many Lisps. It does have access to imperative features.
What I probably like best about Janet that seems kinda neat, at least compared to ohter languages I use, is that it makes it very easy to create packed executables without any external packers. In fact, if Jaylib had access to the Raylib functions for loading Sounds/Music/Textures from memory, instead of from files, I could have made my entry contained entirely inside a single executable.