I have found the real princess.
I like the visuals, music and overall alien atmosphere of the game. It's fun, just floaty enough that you feel the low gravity yet it's still pleasant to control and I enjoyed looking for the clues to solve the puzzles of this compact and completely open area, it was all the more satisfying to eventually uncover the real princess and beat the game. The boost when uncovering a false princess is very cool too. It definitely feels like a NES game as well.
I guess there could be sound effects when you jump and when you die.
Very cool game.