Thank you all for your kind words. I'm very glad you found it interesting. :)
@BigRoyNL && @Kalonica, actually, this is my first game with interactive tutorial and not with some terrible "oh my god, are you really think, I'm going to read this? Are you expecting me to understand what I need to do after I read this" walls of text. I'm very happy that it's working well. :)
Sorry about the difficulty. One moment when I realised it's very hard, I even wanted to add YOU DIED screen. :D