Bloons Tower Defense 5 - January 28, 2012 - Bloon Circles, Easy - NAPSFRILLS

"Win using only Tack, Boomerang, Glue, and Apprentice Towers. $800 Starting Cash."

Here's another daily challenge guide, from January 28, 2012. Have fun!
Suggested Specialty Building: Apprentice.

When I say a round, do the upgrade BEFORE that round starts.
Round 1 - Start with a 2/0 Tack(A).
Round 4 - 2/0 Tack(A) to 3/0.
Round 7 - Place a 0/0 Apprentice(B)
Round 9 - 0/0 Apprentice(B) to 0/1.
Round 10 - 0/1 Apprentice(B) to 1/1.
Round 14 - Apprentice(B) to 2/1.
Round 15 - Apprentice(B) to 2/2.
Round 16 - Place a 0/0 Glue Gunner(C), Strong.
Round 17 - Glue Gunner(C) to1/0.
Round 19 - Glue Gunner(C) to 2/1.
Round 21 - Place a 0/0 Apprentice(D).
Round 22 - Apprentice(D) to 0/1.
Round 24 - Apprentice(D) to 1/1. 
Round 27 - Apprentice(D) to 2/1. 
Round 28 - Apprentice(D) to 2/2. 
Round 29 -  Place a 0/0 Apprentice(E).
Round 30 -  Apprentice(E) to 0/1.
Round 31 -  Apprentice(E) to 1/1.
Round 33 -  Apprentice(E) to 2/2.
Round 36 - Glue Gunner(C) to 2/2.
Round 39 - Glue Gunner(C) to 3/2.
Round 42 - Apprentice(B) to 2/3. 
Round 44 - Apprentice(C) to 2/3. 
Round 46 - Apprentice(D) to 2/3 and  place a 0/0 Boomerang(F).
Round 47 - Boomerang(F) to 2/0.
Round 48 - Boomerang(F) to 3/0.

Win!