Thank you for the report, I really appreciate it!!
- I hadn't encountered, even after multiple playthroughs and tests, the "multiple items that consume the same item" issue until you mentioned it! I did double check in engine and yup your right! This was probably just RNG and I was sure there code that prevented this but whoops ig, thanks! (I've added it to the list)
- The "incorrect domino effect" / "severe lag on clicking the ambiguous cells in larger boards" are actually the same issue! I went a lil' bit more in-depth on this post/reply but its mainly because the board state is "too ambiguous" and it struggles to get solved by my solver!
- Yeah the game is generally unbalanced but yeah the gold is especially bad xd