Thanks a lot for the feedback. I will keep all of this in mind and be sure not to repeat my mistakes.
BTW background looked really good when I made it in photoshop. I don't know what happened to it when I imported it inside unity. I tried looking for solutions but could not find any so I decided to leave it like than for the time being. And I was going to work on adding more animations like you have suggested but just didn't get enough time to do so.
Anyway, thanks for your feedback. I really appreciate it. Peace.