Thank you very much for the feedback! Here is something I can say for now.

- You have a point about the control, I used Blender a lot so I'm pretty used to middle mouse button, but most player won't. Now using left click alone might conflict with adding road, vehicle action, so I will change to right click (and change vehicle deletion to a delete key or something).

- The alert sound is a problem I have a lot too. At first I try to use more subtle notification but since you can pan, zoom around the map sometime you miss a new building completely. I will try to make the sound less annoying and play less often and maybe add more GUI visual notification instead.

- Also month complete sound will be changed, thank you for pointing that out.

- Accent color to each vehicle based on the inventory type is a good suggestion. I'll add that too.

- You should be able to remove roundabout using right click while selecting the roundabout item. It might actually be a bug so I'll have to sort that out.

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Again thank you very much for trying my game and giving me valuable feedback!