APk + OBB 
Install Bloons TD 5 Apk
Copy 'com.ninjakiwi.bloonstd5' folder to 'sdcard/Android/obb'
Launch the Game

Updated: March 27, 2015
Current Version: 2.15.1

APK MOD MONEY
usercloud: http://dl.apkpro.net/8wK
tusfiles:  http://dl.apkpro.net/8wL
zippy :    http://dl.apkpro.net/8wM
devhost:   http://dl.apkpro.net/8wN

APK + OBB
usercloud: http://dl.apkpro.net/8wO
tusfiles:  http://dl.apkpro.net/8wP
zippy :    http://dl.apkpro.net/8wQ
devhost:   http://dl.apkpro.net/8wR