What a great little puzzler concept! It was quick to learn the controls and what I was supposed to do, and I had fun solving the puzzles. Some small changes to your UI could have improved your game's presentation. For example:
- Choosing a different font for the pages with lots of text would make them easier to read.
- Making your "start game" button stand out more would make your start screen easier to use. Because it blends in with other assets that are just decorative, for a few seconds at the beginning I wasn't sure where to click.
The levels themselves looked great and were well varied in design - lots of potential here! Also, the formal business tone of your letters to players made me laugh. Not sure if that's what you were going for, but please be advised (lol) that it was memorable for me. Great work on this!