The game is great, I really enjoy it. One thing that could be improved is the ability to modify the terrain for better building placement. For example, I have a terrible time trying to build a hangar because of its size, which takes up a lot of space and requires a level surface. This makes it difficult to access the hangar because one side of the ramp is on the ground, and the other is in the air. Another problem is finding a suitable spot where it's not red but green. Or perhaps adding some basic building blocks where buildings could be placed.
Furthermore, you could consider adding achievements to the survival mode. The water/gas cable has a drop after 999 pieces
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