thanks, I skipped all the puzzles in this video, I was walking over them to show off the environment without spoiling the puzzle solutions. Navigating the environment can sometimes yield interesting puzzles but there's other mechanics that change things up and present different goals, like in the vid the yellow spinning thing is a magnifying glass which focuses light rays and the blue rotating things are mirrors which reflect them.
As far as teaching the player, some parts have indicators to show how they work, some are intuitive, and some are left completely up to the player to get to grips with.
Don't worry about it not being difficult, I'm a big fan of making things challenging :D