Thank you for your feedback!
The version you have tested is a 2 years old version and was indeed quite confusing. We continued developing the game since then and we’ll soon be ready to share a new version. We worked hard, mostly on the second part of the game, the world map, but we also reorganised the city building (new population system, simplified resources) and added a new tutorial. We will post the list of changes together with the new demo. We really hope you will find this new one less confusing than the one you tested.
About the icons size, what is your screen resolution?