I built a CTF arcade. How many flags can you find?

A user has created a project called CTF4.FUN, which is a CTF (Capture The Flag) arcade platform for people to solve cybersecurity challenges and hunt for flags. The creator is inviting others to try the platform at https://ctf4.fun and is seeking feedback on the challenges, their difficulty level, and overall user experience. They encourage users to share their experiences in the comments without spoiling the flags for others.