I've been a fan of the Rusty Lake people for a while now.  See the list below of their games that I've played. The artwork is good. The puzzles are generally fun. And there's usually a creepy element.
Cube Escape: The Cave continues the horror-story/puzzle-room experience.
Bonus Points: See the man in the Fedora hat" He's been a fixture in these puzzles: always give him a drink. Or two!  I'm not sure if he's been in every Rusty Lake game. He should be though.
Demerit Points: the puzzle with the key is the same as in The Mill. A mold of the key is given and you must pour molten ore to make a copy.
Weird: in the submarine portion of this game, I was fiddling with the controls at random and moved the sub to a spot that led to my skipping a whole section.
The Cave is an okay game. Not nearly as good as Seasons, which is their masterpiece. What's definitely missing is one of those 'what the hell is going on"!' moments like the ones in Birthday and Arles.
https://itunes.apple.com/app/id1209468207
https://play.google.com/store/apps/details"id=air.com.RustyLake.CubeEscapeTheCave

Sometimes it's okay to consult a video walkthrough!

https://www.youtube.com/watch"v=d80AQGv7BfE  Part I
https://www.youtube.com/watch"v=mCkc-nMAKa4  Part II

Other Rusty Lake Games I've played/reviewed:Cube Escape: BirthdayCube Escape: Case 23Cube Escape: The MillCube Escape: Harvey's RoomCube Escape: The LakeCube Escape: ArlesCube Escape: Seasons
Cube Escape:...