Maybe I wasn’t very clear, I meant the ability to clean sand cells. You can lose too many cells (and have no space). But, yes, it is a little contrary to the idea of counter action, if you can easily get rid of sand, hmm...
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Ok, I get what you mean. Some kind of swipe/scope thing to remove sand. It's kind of handled indirectly by placing the trees and bushes close to the sand and their area of effect counters the sand. Anyway the game mechanics needs tweeking, it will take me some time to figure out in what directions I want the gameplay to go .