Firstly download the cheat engine. Open it and open blo0ns tower defense (bdt).  Type ( your money ) in the value bar of cheat engine and click first scan. Now many things should appear on the left. But one monkey and type (your money now ) in the value bar and press next scan. Click on a  thing that  should  appear on left. Then click red arrow near the bottom. The address should appear. Right click on it. Hold the mouse on change > go to value, then type 9 & 8 zero’s. press OK. now pop one balloon. You should have lot amount of money! enjoy!