This is a linear puzzle: you must solve your current level to progress to the next one.
There will be 6 chapters and 44 levels in total, excluding the tutorials.
Currently only 4 chapters with 26 levels are available to play, the next puzzles will be added gradually.

Click the level number at the top of the screen to view all previously unlocked levels. Your only goal is to find the correct answer and access the next level's page, continuing until you reach the end screen.
The answers are ALWAYS found via meaningful and intended ways. Don't expect some random gibberish to be the correct answer.
When you have the answer, change your current URL to <answer>.
Example: If it is brick and you are at bilkentpuzzle.com/a/b go to → bilkentpuzzle.com/a/brick. The answer to this page is violet.