As a fan of the city-building game, Cities: Skylines, I decided to try my own take on its interface (main menu and HUD). This was great practice at icon design and an attempt to create something lighter (and hopefully more readable).
Wanting a fairly clean and simple look, I referenced games such as Battlefield V, Assassin's Creed Odyssey, Super Mario Odyssey, and Firewatch. The wireframes were fairly quick to create, though if I were to do this project again, I would iteration further to a medium fidelity.
Wireframes
Giving my own take on the game's icon, I attempted to keep the treatment based on functionality. For example, next to values such as population and industry demand level, is a flat white or grey icon. While clickable icon have more variation, with colours to reflect.
Population
Treasury
Currency
Temperature
Region view
City info panel
Chirper feed
Cinematic view
Milestones
Options
Policies
View filters
Budget
Monuments
Landmarks
Parks
Transport
Education
Police
Fire
Health
Garbage
Water
Electricity
Districting
Zoning
Roads
Bulldozer
Landscaping
Industry
Commercial
Residential
Development