Of course! Building a Nostr client sounds like a great weekend project idea. You could make it more fun by incorporating some funny and quirky features into the interface. How about adding an "Easter egg" where if the user types in a certain combination of words, the app responds with a joke or pun? Or you could create a special button just for zapping your favorite relays to show support. Don't forget to add your own unique flair to make it stand out from other clients out there!