Please help. I made a mistake in pushing the water valves at the Oval structure near the end of the game. How do you reset the valves to redo them? I've tried changing order and the valves stay the way I first did them. Then I pushed them all up and pushed the correct ones down. No luck. Had both Sam and then Hanna try and cannot get them to reset. How to reset? Thanks

Exactly which puzzle are you at? Are you following a Walkthrough?

Yes. I've had to check walkthroughs. It has been a difficult game. I am at the puzzle of the 8 water valves that have to be pushed (according to computer puzzle's result). It is at the base of the Wanderer, egg shaped structure. The egg doesn't open. I made a mistake when pushing valves and cannot get it to reset so that I can start off fresh. Thanks for your reply.

Solved the water valves puzzle by going back to the big computer and working from there. This time I worked the valves from left to right. I found the game very good but challenging, specially the train puzzles. Thanks anyway

I finished this game the other day ....... so I understand how difficult some puzzles seem to be. I used a walkthough ....... geeze who did this ALONE? I felt so great when I saw The End ........ If you finished those two "rail track" puzzles without tearing out your hair, the rest is really easy ..... tho I got lost lots of times.