If you've been following this blog, you'll know that I've done way too many puzzles like this and enough is enough! However, Slangle is quite good. For one thing, some of the pieces are triangular and that's new.
Also, the shapes are quite nice.
There are 44 levels and 20 of them are free. I did 20 free levels in about 20 minutes. I would have done them faster, but ads kept popping up.