Open Cheat Engine.after opening Ailce Greenfingers, select Alicegreenfingers.exe in the 
process field.Enter the money and select 'First Scan'. It will show many Addresses. 
Then make changes in the money and enter in the cheat engine and select 'Next Scan'. 
it will show only two address. Select and copy it to the address list.
Enter the value in the value tab.Test it. the money will be changed into the value you
entered in the Cheat Engine.to freeze the money, Select Frozen option in Cheat Engine, 
The Money will never be changed.