Congratulations on solving the level! there's a few things we should go over when you solve a level.
Solving one level alone is not a challenge, and you'll be able to view the next new unlocked levels after solving.
The same can't be said with two separate levels/paths, however.
Solving one path rewards you with a nth of a TXT.FYI link.
E.G. let's say that you have solved two paths, so you should have 2 parts of a TXT.FYI link.
Combine both parts to form a full TXT.FYI link, and then the TXT.FYI message will allow you to unlock more new content.