Thank you for your positive feedback and for sharing your experience playing the game! I'm glad to hear that you enjoyed it. =)
You are right. I definitely plan to implement the tile inspection feature. Regarding your idea for specialized units to build barracks, airports, and piers, I think it's a great suggestion that would add an interesting twist to the gameplay. I will certainly take this into consideration as I plan for future updates.
If you have any more suggestions or feedback, feel free to reach out.
I tried your demo today and really like how you implemented the crafting and mining system. In other games it always feels like doing some work ("oh first i need this exact picaxe and click multiple times on one block and then collect this one ore and put it in a furnace by selecting it in a big inventory") and here it's like playing a game...