Hey Harukauranus.
Do you have a program that can extract .rar files? That should be the only thing you need to install the game.
Viewing post in How Do You Know Mr. Blue? comments
Have you spoken to Madam White and Mr. Red? If you have asked all the questions (the boxes with texts under the characters) you should press the computer. There you will find statements taken from your conversations with the characters. Your job is to analyze the statements and find contradictions. Finding a contradiction will give you more possible questions for the characters.
Hope this helps! :)
Haha well you see, my problem lies with getting the game to even start it pulls up as a blue screen with one H and I can't make a new game either. It hasn't pulled up Madame White or Mr. Red so I am stuck haha. I thought that detective games there might be a puzzle to start it. I can press STARTING... and it will move I have also been able to click ENDING... without it shutting down the program. I'm not sure how to start the game or if this is a matter of my computer. You are so nice in helping me, I appreciate this a lot!