Step 1 (added in the 2nd edition)
The first step is to find out the coding system that is used. Afterwards you should think of what symbols you’d expect with that code, and what symbols you encounter at the Card. Which symbols on the Card could correspond with which standard symbols in the code? And finally, how many symbols do you think would form one letter? Where are the “spaces” between the letters?
Look at the left side of the front of the card at an angle, and you should see the word ‘MORSE’ written by the lines of light. Apparently we are dealing with morse code. First step: done.
In order to decipher morse code, you need to know the number of symbols that are used per letter of the final outcome (the intervals, step 3 from Hint #1) and you need to know the meaning of each symbol – step 2 from Hint #1. Which one means dash and which one means dot?
Only in the labyrinth on the back side we can find the same symbols used on the front, therefore this must have something to do with their meaning. Starting at the arrow, the only way to the ❈ is a straight horizontal line. It means dash. The only way to ∰ is through a circle. It means dot. Step 2: done.
Now we should look for the intervals. The letters on the middle of the back of the card repeat a certain sequence a number of times. The word ‘space’ is printed a lot. That means you should read B D E A C F (“space” translated into ” “). The solution word also consists of six letters, so these letters will indicate the number of symbols used per letter of the final solution (step 3 of Hint#1)!
The next step is to connect the letters we found to numbers. Note the weird phrasing of ‘Only The Light Counts’ on the back of the card. Apparently candles are supposed to give us numbers. On the front of the card, in every room a certain amount of candles is placed. They do rather stand out against the rest of the card, as they are emphasised heavily. Every room also has a letter, from the same list we found before. The Card tells you to count the candles, and that would be perfect for this scheme (as the candles are supposed to give us numbers)! For example, room D has three candles and therefore gets the number 3. Following this line of thought, we can translate B-D-E-A-C-F to 4-3-1-1-4-1. We completed the checklist from Hint #1!
We now know that ∰ means dot and ❈ means dash. We also know the number of symbols used per letter is 4-3-1-1-4-1. This provides us with the following morse code: -∙∙∙ (space) ∙-∙ (space) ∙ (space) ∙ (space) –∙∙ (space) ∙ . Using the morse alphabet, we find the solution ‘BREEZE’.