The idea for this web series and the development are creative and intriguing. It's a story I hadn't seen before and the emotional development of the characters and how they deal with problems is really well written. It's what carried me through to the end of the story. The moment when he sees the colors is also exciting and the special effect is good enough. Even though it's repeated almost every episode it's always nice to see it again.
This concept deserves a high budget, 16 episode TV series. There are plenty of insights to be had.
The rest leaves something to be desired. Most of all I found the acting weak. Aside from Yoo Jun, everyone else really leaves something to be desired, bringing this series back to a cheap product. A real shame because the potential was immense.