Unfortuantely, I got my computer broken and needed to fix this… 
But, today I made some progress, I can now in a very dirty way destroy a selected tile, so the water can go through. It is working on action.released, so you need to click every tile, but I hope I will have enough time before deadline to polish it, add some explosion so more tiles could be affected. Then I need to add some game mechanics around this idea 
Another thing is, that I have a problem that is mentioned here every time I click on a tile 
For now, I don’t have any idea how to overcome it
Defold team, how’s your progress, guys???