Here is the homepage of the site.
Pressing the first dot on the site gives you a page called "password" which when button 2 is pressed starts a download for a .zip file called "3rd Circle". This contains two files one called "key", a text document, and the other "MqYPQ", a .png file. Both are protected by a locked password so I cannot access either.
Clicking the second button on the main page brings you to a large page called "w" with multiple buttons on.
The "w" page
When the button labeled "2" is pressed it gives you the following image:
When the button labeled "3" is pressed on "w" another file called "61k6uvp2xxl" is able to be viewed:
This cipher wheel may be useful for a future decryption.
Back to "w", when "7" is clicked it comes up with three buttons "KEYBOARD", which sends you back to the homepage,"QWERTY", which downloads "circle-gate" (as with "3" and "7777", also sends you back.
"8" brings you to the "password" section (as does the click of the first dot)
"6" brings you to a page called "code" which when Ctrl+A is pressed on it, 3 full stops appear. Clicking the farthest right brings you to the "password" page. The next to a page called "666" with two equations on (see Nick's post) and a file called clue.txt which is locked. The last brings you to a "caesar_cipher_left_shift_of_3.svg.png" picture file with shift on.
"5" brings you to a page where you can download a folder entitled "what_gate_do_you_seek_the_most", inside being a textpad file called "LOCATION" but it's not able to be opened.
"1" brings you to a page called "3rdcircle" that has the words "password" with seven arrows under it pointing to the left. However, there is nothing visible there.
Button "9" on "w" leads you to a page called "Rabbit Hole". This is probably one of the most confusing pages. Here is a small diagram I made showing the combinations and outcomes
Firstly, all the black boxes are buttons, the red boxes files/ outcomes, and the green boxes outcomes that send you to the page with the buttons shown.
The prominent file "Suicide Mouse" downloads a file called "sm1" inside is a 9 min 5 sec video called "Suicide Mouse" that is crated in the style of the old Mickey Mouse cartoons, and is of Mickey walking along a pavement. Over the course of the video, Mickey begins to glitch and laugh weirdly until the climax towards the end where the image goes black and a few seconds later he gets shot in the head. The video ends with the classic "The End" words, but in the last frame these words in Russian dialect appear: "визирования ада приносят своих телезрителей назад внутри". This translates to "sightings of hell bring their viewers back inside".
"june_15_2012.zip" is a folder which, inside is another folder, "zuluindiapapapapaechoromeo" which is protected making it impossible to open. The name of that file is actually in the phonetic alphabet and reads "zipper".
Lastly, "Finally.zip" has a file called "finallyyyyyyy" which cannot be opened.
The final circle on the page brings you to the "3rdcircle" page.
The "3rdcircle" page
Hope this helps. More analysis to follow.