Looking at the files in the game folder it's not immediately obvious, but v1.2.0.5 includes Expansion Packs 1, 2, and 3 (last one released February 12, 2024).

Can't save game, any help? Anyone?

91% ratings out of 99 people base on steam as of Jan. 26, 2021.
https://www.youtube.com/watch?v=HOQZ_mnuYM8

It's actually much easier in 3D.

Cross your eyes to speedrun it.

This is a very good Puzzle game , You must find the differences between the left and right 3D objects . Its graphics is charming and its music make You feel relax . This game deserve spend Your time .