There were also negative reviews about this game. I can understand that. There are levels where you lose interest in the game. In some levels I don't have an idea how to start, in others it is immediately clear to me: e.g. the middle column in level 27. The GIF on the game page here shows a level with level 50 that seems very confusing and difficult and could be the reason why you give up. Level 58, on the other hand, seems more manageable and doable. This is a subjective impression that can decide whether you want to continue playing a game or not. The bonus is also detrimental. Many players tend to want to achieve the best possible score and therefore want to solve the level correctly on the first try without making any mistakes. If this does not succeed, the game is to blame. Then the game might be declared a stupid game which you don't want to play anymore.
By the way, I believe that many users of newer Linux distributions than Debian Jessie or Stretch (or distributions based on them) can't play the game because libcrypto is not installed, can't be installed or there are backward compatibility problems with newer versions.