got stuck a few times, had to search a long ways for an available switch to toggle the switch state to something favorable before being able to find new areas. Not bad, just tedious. Got stuck in the green area (wherein you platform and particle physics over to a blue switch to get to a purple switch to open a door to... I don't even remember!)
I collected all 42 artifacts over the course of, I think, 90 minutes. If that tells you anything. about the quality of your game.