Most of the issues stem from the UI which doesn't scale properly so that text and buttons are all over the place and it becomes near impossible to navigate which is a huge issue in a game that is about button clicking. The font is also quite unappealing. I recommend checking out some tutorials on working with UI in Unity (there are plenty of good ones on Youtube) to get the basics down. If you fix the UI and make it more appealing, this has the potential to be an interesting concept but in its current state it's barely playable, unfortunately.