The game is interesting. At one point in the early game somehow my single oil refinery was repairing just in the nick of time to send out a ship and then gets hit by a missile, so I always had some money. That was when I realized I made the mistake of buying the centrifuges early. With that slither of income I just slowly upgraded the missiles and then bought the refineries and then just afked to victory lol. Anyways below is my feedback.
I actually did not realize that the 25m was for the purchase of the oil refinery until I clicked it. Lol on hindsight it was obvious but because it cost quite a bit, and I wasn't sure what it was, I avoided it in favor of other stuff (the missiles) until the other stuff was too expensive. Only then did I click on it and realize what it was for. I think it would be nice if there was a tooltip when you hover over it.
It is kind of weird that technically you could win by just buying centrifuges, though that will take a long time. At the same time it does seem like it would be too difficult to balance the lose condition around the different systems (like if the lose condition was everything destroyed, then the defense system becomes priority etc.). Maybe time? Like you need to build the bomb by 4 in game years? I'm not sure really.
-EDIT- Actually it suddenly occurred to me that perhaps it would be alright to have different lose conditions in the different systems, as that can just be something similar to a challenge mode. It would give more variation in the strategy required depending on the lose condition.
It would be nice to have some agency on where the initial anti air systems and oil refineries are placed, would also add some replayability and variation to the game.
The visuals are alright, and the audio wasn't too loud and fit quite well. The starting dialogue/tutorial was quite amusing. Overall, it was an enjoyable game. It strangely reminded me a of Plague Inc.