Had a quick runthrough.
First, there's missing textures and hom's all over the place which sometimes make it hard to even know where you are. Human base is invisible because of this.
Gameplay wise: too narrow, a lot of hallways are so small that when aliens evolve to dragoon or tyrant they'll have a hard time getting out of the room they evolved in. As with all narrow hallways they're always deathtraps for aliens. Rooms near the staircase can't be entered if you're marauder or higher. Built a testbase with just 4 teslas as defence in one of those and they were unbeatable. Needs a lot more room and a real fix before it can truly be tested.