I've played your map a couple times, and have found a couple problems with it
The upgrades/mineral rewards are unbalanced; to simply defend against an ultralisk I need 40 armor, however to get to 40 armor, I would have to spend so many minerals, the +20 from the 4 dark templars received at level up I get becomes useless.
Also, if you switch on autocast, and move the defiler to help, your view is stuck on the help section, your only options at this point are to hope you hotkeyed the defiler and move it on the minimap.
Thus it would be nearly impossible to kill the firebats!
[edit]
i got bored and decided to find out how much mins it takes to upgrade to 40 (using a formula)
level 1 = 5 + 0
level 2 = 5 + 1
level 3 = 5 + 2
in general, to upgrade you need 5 + (n-1) minerals where n = level of upgrade
to go from level 1 to 3 requires
5+0 + 5+1 + 5+2 = 18 minerals
level 1-4 =
5+0 + 5+1 + 5+2 + 5+3 = 26
level 1-5 =
5+0 + 5+1 + 5+2 + 5+3 + 5+4 = 35
so...
in general you need
[10 + (n-1)]*(n/2) minerals to upgrade
so for level 40..
[10 + (40-1)]*(40/2) = (10+39)*20 = 49*20 = 980 minerals o_O