There are four main colours in the game, each representing a different era. Your goal is to find the name of the era and the year your in. For clarification I replaced the symbols by letters.You start in the room with a red table and a bright light. Click on the white part of the lamp next to the laptop. You will see a red sphere. You can change the colour by clicking on the side of the screen. You can change to four different colours: green, yellow, red and blue. The order isn’t important. Click on the sphere colour of your choice to enter the tunnel. At the end click on the sphere again to enter the room.
Red:
You’re in a multicoloured room. Click on the chair. The last word is the name of the era: future. Click on the down arrow to go to a dark room. Click under the desk to find a letter. Write down the symbols on the letter (ABBC). Click on the letter again to close it. Click on the red picture on the wall over the laptop. There’s an equation. Write down the symbols (B:A=B). Go back to the first room by clicking on the center of the triangle. The right side of the closet is the entrance back to the main red room. Click on the white part of the lamp.
Blue:
Go to the next room by clicking on the down arrow. Click on the bin. It’s material is the name of the era: metal. Click on the laptop to read a letter. Write down the symbols (BCAB). Click on the letter again to close it. Click on the center of the triangle. Then click on the right side of the closet. Your back in the main red room. Click on the white part of the lamp.
Yellow:
Click on the front of the closet near the doorknobs to find a letter. Note the symbols (ACBB). Click on the chair and note it’s material: mosaic. That’s the name of the era. Click on the right side of the closet. Your back in the main red room. Click on the white part of the lamp.
Green:
Not much to do here until you switch on the light. Click on the plate with symbols to see an equation (A+A=B). Click on the down arrow to enter the second room. Click on the red picture hanging over the laptop to make the room change colour. Click on the bin to find a letter. Write down the symbols (BBAC). Click on the laptop to learn the name of the era: present. Click on the center of the triangle to switch off the light. Click on the center again to change rooms. Click on the right side of closet to go back to the main red room.
Main room:
Click on the red picture over the laptop to change the colour of the room. Click on the bin to find another equation (B+C=B). Click on the white part of the lamp to enter the solution. And here it is: From the last equation you learned that C must be 0. From the equation in the red room you can tell that B=2 and A=1. This can be checked by the equation in the green room: 1+1=2. Click on the button to proceed. Click on the coloured squares on the wall and enter the right name/year. Although the input box states Blue Age all the time, remember the colour you clicked. When all four are entered correctly, you’ll see the age you’re in: BCAB. This can be translated to 2012 a.k.a. the present. Welcome back.
Game source: The game was found here on the internet.