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There's a walkthrough if you just want the solution. For more of a hint, think of the relation between the ranks of General and Lieutenant General.

There is a cheat code if that helps? :D I can write a walkthrough showing all the solutions, although the final puzzle (one after the 3rd pipes grid) is a bit trickier to write about, rather than just providing a way to skip it or to solve it automatically.

Thanks :)

With these light puzzles, the simplest way is often to just bruteforce it, unfortunately. A slight optimisation is to write down the patterns that you can toggle so that you can at least spot when you are one move away from the solution.

If you are into maths and computer science, this type of puzzle has a more systematic way to think about it (and to solve it). The state of the system is the 7 windows, on or off. Clicking any window toggles 3 windows, in a predetermined pattern. You can encode the entire puzzle as a linear equation in GF(2). The toggling patterns become a 7x7 matrix, with each column representing one possible move. The goal is to find a set of moves that results in all lights on, or in other words, to find a vector which, when multiplied with the matrix, results in a vector of all ones. In sagemath (free online version at cocalc.com), which can solve GF(2) linear equations:

# the puzzle
#
# we number the windows 1 - 7 in some order,
# here: left to right
#
# every column represents what happens
# when a window is clicked
#
# for example, column 1 shows that clicking
# window 1 makes windows 1, 3, and 4 toggle
A = matrix(GF(2), 7, 7, [
  1, 1, 0, 0, 0, 1, 0,
  0, 1, 0, 1, 0, 0, 1,
  1, 0, 1, 0, 0, 0, 1,
  1, 0, 1, 1, 1, 1, 0,
  0, 0, 0, 0, 1, 0, 0,
  0, 0, 0, 0, 1, 1, 0,
  0, 1, 1, 1, 0, 0, 1,
])
# our target is all lights on
b = vector(GF(2), [
  1, 1, 1, 1, 1, 1, 1,
])
# solve the linear equation
x = A.solve_right(b)
print(x)
# >>> (1, 0, 0, 1, 1, 0, 0)
# so the solution is:
# click windows 1, 4, and 5
# (just to verify, does `x` really produce
#  `b` in our puzzle?)
print(A * x)
# >>> (1, 1, 1, 1, 1, 1, 1)

That's exactly it. The little rectangles in the chimney face in 4 different directions. And you have 4 windows to press, facing the same 4 directions. Just follow the order :)

See my reply to KNGDAVD Game Team below :)

Yup, I know. I would have liked to add an accessibility feature but time was limited (it is a gamejam game!) Also I think a puzzle where you gradually rely only on one sense where originally there were two is interesting, and for accessibility the only real option would be to skip the blind parts altogether.

There is just the one ending!

There is! I don't really like pixel hunting, so I am not super happy about it being in my game, but I ran out of time for the gamejam. What you need to click happens to be very close to the back-most chimney that just went down.

Haha, sorry, the "exciting ending" is something to take with a grain of salt ;)

Thanks! Yes, the lifted cabin is the final puzzle of the game. As for a hint:

(spoilers of course) The lifted cabin is the only piece of the puzzle. What positions are available on each of the three windows? Do any of them do anything at all different?

(The 7-window puzzle earlier on is definitely solvabe without brute force, although I guess it takes a piece of paper.)

Maybe the jump to that puzzle was too sudden, or I should have added at least some subtle feedback! If you'd like a hint …

(spoilers incoming)

The only two relevant elements in that puzzle are the 4 windows and the chimney that just came up. Can you see anything similar about the two? You do need to press the windows in some order.

As always, thanks for your review and kind words :) And a full video walkthrough takes a lot of patience!

As for the hardcore-ness, I tried to avoid overwhelming the player with possibilities. Except for one tough word, I think most of the words only go through one or two transformations before being used again. And I think taking notes while playing the game makes it a lot more bearable ;)

Ah, sorry for the late reply – I don't go to itch too often! :) So once again, thanks for the support!