Good game; Reminds me a lot of X-Com. My only real complaint is that the last two missions are super anticlimatic; sure the huge aliens look cool, but when Magnus can destroy them from half the map away behind cover using only half his AP, what's the point?
Other than that, a few small things I'd change; It'd be nice if there was more use for money; maybe some armor, or have Stimpacks and Medkits cost money instead of EXP.
I also there were some enemy types that had more health; It's kind of weird when you start upgrading your power and realize that your troops can now kill any enemy in one shot with any weapon.
Still, 5/5, very impressive.
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