I had to check walkthrough because I couldn't get anywhere.
#1 The clue is backwards in puzzle with squares in 1st scene. It's supposed to be a 9. The clue has the bottom of the #9 curving the wrong way.
#2 My stick disappeared so I couldn't get the chameleon. I'm not referring to the torch. There are 2 sticks to be collected. I started over and 2nd time it stayed in inventory.
#3 Some puzzles were left to guesswork, no clues. Thankfully they weren't hard to figure out.
In my opinion, there were FAR too many things to collect. 13 items needed for last puzzle, 5 for another, 4 each for at least 5 more puzzles. That 38 pieces just for puzzle pieces. Then there's all the clues, tools, keys etc to collect too. You need to go back and forth through a lot of inventory.