The puzzles are hard but not time consuming, you can get back to where you were stuck usually in less than 1 minute,

Assuming you can remember exactly how to solve each puzzle. I'm with OP on this one.

I still stand my my (old) comment. I loved the game but gave up because some of the puzzles are quite long and it would be convenient to split up the saves.

Walking around is very time consuming. If you could insta-click to go to destination and screen transition was made like 10x faster then it would be ok.

The game feels very sluggish and it takes forever to do anything.

You cant save before the puzzle? No level auto-save?