In short in that game you need Credits :
Here is how it Really does work: In the game folder you will find a folder called ''PlayerData'' Open that and open the file TD6.pm0 (the 0 can be another number also depending how many names he or she made) Using a Hex Editor (like Hex Edit ) go to line 630 and you will see in 'box' 5 and 6 these Hex numbers : 409C 0000 (the default when you start a new name ) edit them in FFFF FFFF and you will have enough credits to get all the things you can get without destroying the game pleasure.