They recently made an official developer PDF walkthrough in the downloads. It tells you the solution to each panel & ending with images. It would beat any itch.io comment made here.
- Be sure not to miss reading the word directly above "Comments" and beside "253 kB."
- Click Download Now. You can download it separately in Step 3. Choose to buy or go straight to the download page.
- Click Download next to the word you read in Step 1.