For internal Cheat Mode Press on the keypad the following keys:

(    Go to next level
)    Gives you 100 points
/    Gives you 1000 points
*    Gives you 10000 points
7    Gives you 1 Coin
8    Gives you 10 coins
9    Gives you 20 coins
-     Gives you 50 coins
4    Reset time counter
5    Adds ten secunds
6    Adds 30 secunds
+    Adds one life
1    Adds 5 lives
2    Adds 10 lives

  