The game has 4 endings. In one of them, you just don't do anything and the game ends with the inscription "end?". In order to get to other endings, you need to look for moments where you can notice a "hint". Let's say at one point, at the beginning, the inscription "enter password" appears for a while. There you must enter the first lines from the "blue screen". If you look in the game, you'll see what I mean. Thanks!