Level 1: Not only is the door closed, the URL is too!

Level 2: It's in the name. "hydro"

Level 3: Look up. You wont find anything in the image.

Level 4: Make it make sense! First things first.

Level 5: But have you heard of his code?

Level 6: First things first again. Not everything is useful.

Level 7: What word could it be telling you? It's showing you where to find it.

Level 8: Have you noticed that there are exactly two dots for each colour?