Well
The game is addictive and has that nice old school charm, giant map, decent save system, and tricky puzzles, and a nice non-linear gameplay. The plot raises questions without shoving them in your face, and leaves the result to the player. The fact the ship runs out of fuel yet starts with three red crystal slots open makes a lot of sense once you've beaten the game.
The backgrounds and music are cool, and it's worth it to restart the game so you can see what some areas look like before you start ripping apart the fabric of the world's reality, and the way the world begins to change as you go further on your quest starts off subtle but ends impressively- one of the biggest twists for such a simple game.
The puzzles are easy and are also easily skippable until you want to figure them out, and the use of the shot weapon for harmless art was a nice touch.
I would have liked maybe some different music for each area, and maybe a little more in the way of color before the big reveal, which would have made the final effect much more shocking.