This is a really charming game that was easy to pick up. I love the use of the palette and the level design felt fair but interesting, and introduced new mechanics at a nice pace. I would love to see a small bar fill up for the enemy detection, or a sight indicator for them. I also never really encountered a failure condition, and even when I just stole the closest thing to the door, I was able to progress to the next level.
That said, the game was really polished in terms of art, UI animations, sound, and gameplay. I also liked how you used the name of the theme palette in the gameplay!