Thanks for your comment. Since I made this game while I was learning unity and game dev. , I didn't plan on story , game design etc.. Whenever I learn something, I just add it to the game and this makes the game more complicated. I was very exhausted but at least, I wanted to finish this game. Anyway at the end, I have a game which is playable (theoratically). Also, I learned so much from my mistakes. Next time, I hope I will make better games.