You are correct. I replaced the first L line in the data.txt with each time another xxx.txt level file. Most of the levels were showing cut of edges or a cactus in the water. 3 levels were totaly empty. 3 were completely unsolvable, and 2 were to simple.
But I conclude with my congratulation with making such a nice game. I also played you other gem of a game Konkan Coast Pirate Solutions.
Brilliant.
Thank you for you support
Theo