This is really neat!
The only thing I would like is to be able to filter challenges by both experience level and topic at the same time....so that I don't have to scroll through and search for what I need. I am not able to do this from the labels either. If I select spatial, I get all the challenges for spatial, but then I have to go into each challenge to see the experience level.
I made an Excel file that lets you filter the challenges using slicers so that you can see the challenges you want of a specific experience level and topic. The file has hyperlinks to the challenges, so you can go to the one you want directly from the file.
Right now the slicers are set to only allow you to select one option at a time, but you can change this by clicking on the multi-select icon on the top right of each slicer. I also threw in a column to help you track challenge completion. I'm currently studying for the Advanced Certification exam...so I totally needed this!
If this is useful, I'll update the file weekly. Or if anyone at Alteryx wants to take ownership of the file, you guys are welcome to!