I thought the light-electricity-rain-magnet puzzle was interesting and intricate enough to make a fun challenge. Part of that was figuring out the mechanics, but it was fun doing so. Perhaps with more levels/puzzles it would need something more intricate eventually as you said, but for this it was a fun level of difficulty.
I did get to the end! The seesaw puzzle was well implemented I think. Maybe a little finicky with the timing of when the sheep counts as being on it, but nothing too bothering.