Hello thanks a lot for your feedback !
The artwork is from the pack Ninja Adventure by pixel-boy. As for the puzzle you mentioned, it's likely because the camera is zoomed in too far. My apologies! You're supposed to get the solution from an NPC above the switches, then, a hidden path will open in the previous room on the left.
I know it’s a bit tricky to tell when you've found the right solution for this puzzle, as there's no audio or visual feedback for it yet. Sorry about that!