Thank you for the words of encouragement. I tried to make the whale bigger but then it would never pass between the pipes. For the record, I don't like anything about Flappy Bird and I agree with you, it's indeed a shitty game. I just thought that it's gameplay would be easy to recreate.
I'm working on a new game concept at the moment. With a little bit of luck, it'll turn out nicely. All in all, this was my first game and in some way I am proud of it even though it's riddled with flaws. Hopefully, it won't be the last game I make. Once again, thanks!