Until now I was stuck on the level eight and I progressed up to level 16, but now I block on the 17th level I know that the game is rather old and that also people succeeded in finishing it and I would please wish to have some assistance.
If you want I can provide you a total solution step by step which goes from the first level up to the 16th level, this solution contains a capture of screen of each level as well as a grid numbered for located the objects precisely.