I've heard of it, but it doesn't seem worth the price. It seems like it's a knowledge that can be obtained sufficiently from free lectures on YouTube.

나무상수

This course will help you improve your skills by creating a 2D, real-time, turn-based, quarter-view game using the Unity engine and C# programming. The basics section is mainly composed of basic content, so if you have experience using Unity, you can easily follow along.