Looks unique and satisfying as a first impression ☺️
As for your question - ye, its very clear what to do :) And I like how you have some practicing terminals before you can deploy the mission to the planet.
A couple of thoughts on the game loop (sorry if I missed something from the game description, I am new to this game 😅):
1. I noticed that the wall unit doesn't really bring much to the gameplay (probably I am missing something)
I was spamming towers to expand the area that I can move around 😅.
2. It's hard to know where the minerals are, if there was say a "radar unit" that would point the direction that would be verry valuable
3. When you defeat the enemy not much happens. Would be really cool to have some collector mobile unit which could gather the resources from defeated enemies and the refinery stationery unit that could produce minerals from those resources. That would add some variety to the game loop.
4. I found a bit challenging to move around due to colliders that didn't let me walk comfortably around the buildings.
5. I didn't use the builds (probably should've 😅)
P.S. very satisfying mechanics :)