Was fairly fun, beat it, but would say it was a bit easy at most parts, the more you add to a puzzle, the easier it becomes. Like how Sudoku becomes easyier the more you fill it in. Throwing in blocks and paths that don't do anything is a good way to do this, but your clean linear puzzle though made me at least feel smart, even though it was mostly on rails. Very good for a first game though mate.
Didn't see hidden treasure though, that sounds interesting though.