This is a fantastic game, but please don't give it a one star review because there is no Linux version. This game uses Adobe Air, and Adobe no longer makes or supports a version of Adobe Air for Linux. Criticizing the game and it's developer for that for that is unfair, especially when they're such a small company that obviously put a huge amount of effort and heart into the game.
I've played a lot of adventure games over the years, and I can't remember the last time I enjoyed one this much. Both the graphics and music create a world of beauty and wonder. The puzzles are fun and I enjoyed seeing how changes I made in the past affected the present, and how that is part of the puzzles. I found the puzzles to be neither too easy nor too hard. Some of the puzzles did take me a long time to figure out, but they were always enjoyable. The game has a built-in hint feature, but please do yourself a favor and don't use it. The game will end much more quickly if you do. All of the puzzles can eventually be solved without hints through exploration, perseverance, and trial and error. There is more than one puzzle involving color, but those puzzles are not exactly identical. One involves the use of 6 colors and the other involves the use of 3 colors, for example. As for the amount raised on Kickstarter, they did raise more their the goal, but still, $33K is a mere pittance for a video game. Most games from major developers cost well over a million dollars to produce, and one recent Kickstarter game raised over $3.3 million. In all, the designers of Lilly did an outstanding job with what little they had to work with. This is one of my all-time favorite games at any price.