Thanks again Towelie

I tryed some of the sugestions , but i wasnt really happy with them .
But i will do some Bonus Levels that was also sugested.

Now i updated the game with another to things that makes the game harder on the next levels .
1: Sometimes some Cross Pipes with a glowing shine appears , after placing it on another pipe you have some given time to close it . If you can close it in time you get 300 bonus score , but if not the glowing shine of the pipe moves up and if this shine hits other pipes , these pipes will morph to unuseable pipes and cant close anymore (like the pipes hitten by the Bomb).

2: Also on later levels , it could be that a Transparent Box appears and scans the bottom for a free slot , if it finds one it drops down and become full visible. If you hit now this Box with a pipe , the pipe removes and you got -10 Time points. Now its not posible to close the bottom line to get more space for the pipes , only way to remove the Box , is a Bomb .