The typical Five Nights at Freddy's fangame has a certain low-budget to it. It's usually clear that they were made with nowhere close to the tools that professional-grade developers have. Tealerland is an exception to this!
Easily the most polished fangame I've ever played or seen, and the gameplay is addictive to match. Although it does fall into a few bland tropes and odd story decisions like many fangames, I was riveted all the way through. It's really a pioneer of the FNaF fanbase!