The game has incredible graphics, good retro gameplay, and a chilling soundtrack. But, it has its problems, some bugs and lack of polish. The main bug for me was the recruit character, where in the school part, whenever I called him the game bugged and kept crashing. The only way I found to resolve this was to avoid calling the recruit as much as possible until I left school.
The game is excellent in some aspects such as graphics and soundtrack, which are excellent. The puzzles are cool, even quite easy (it took me an average of 1 to 2 minutes on each puzzle), but I believe they're on point, the puzzle mechanics are interesting too, I've never seen anything like it. I find the plot very complex and somewhat confusing, but in the end, just pay a little attention and most people can understand it. Conclusion: it's worth giving it a chance, mainly because it's cheap and short.