1) Start the app you should be given shiny coins
2) Force Close the app
3) Now use root explorer access the games data. on ICS its located at data>data>com.inert soap.f i n g e r z i l l a> shared_prefs>userdefault.xml
4) Use a long hold to edit the file. Its recommended you use another text edited or use a keyboard as its not a very friendly text editor.
5) look down the xml file for the word token change that value from its current value to 9000.
6) Save the file.. and delete the backup
7) Enjoy the game as this game ends at the 3rd city if you don't have any shiny coins. You need the powerups to properly get 3 stars for each lvl.