Control is damn impossible for aliens to reach once humans lock it down and put 2 mds in the central hall.
Vents are too long for sneaking humans and travelling small aliens
Use some more distinct colors than orange and red for doors next time making a plan, it's hard to spot the difference
Human base too strong as said
Alien base is walled into too large a room and can be locked down by 4 humans.
I think it's best if you start out with a bit smaller map to get the feel for what's right and wrong with regard to gameplay.
Not true there are 4 ways for the aliens to get in the Control room i made the air ducts so the aliens can get in all most every room
Must i state everything in full glory?
You have a control room. There is 1 vent near, so near in fact that any human in the control room should notice it and it may even be so close that any dropping alien might not be able to evolve.
Next we have 3, read that, 3 vents exiting in one room, which is near human base and at the start of a long ass hall as it seems meaning their approach to the control room can easily be sniped come unlag.
And then the 5th vent, the one you missed while you were the one that thought up this layout, eventually can only lead to the big room which already has 3 vent exits.
I suppose you are going to make them marauder sized vents, but this still means an effective baseswitch to near the CR and a lockdown of the door means tyrants, goons and adv goons if they can evo have no place to really flee and once the quarantined are is cleaned a 2 man patrol can keep it clear of anything smaller than a tyrant.