The building is pretty nice I like that. Just the way it is although for a thief hide out I would go with a rundown look. I'm rating this in correlation with your story. A drought is why the water is low. If this is infact the case. There would be a stream bed (probably with sand tiles) with a small line of water going down it. Infact I think I'll make an example when I get home. The grass/sand tiles is all messed up yes you can use them in combination for a dimensional effect. But it looks like you just randomly slapped one or the other in place. it doesnt create any dimension to it the path just looks sloppy. I'm curious what those barrel peg things could possibly go into a story but we'll see. Over all I feel the level just isnt thought out very well to match the story. The drought just sounds like an excuse for poor tiling. Make a stream bed where the water dried up and not low water like that.
So over all.
Tiling: 5/10
Tiling to match theme: 1/10
/addon for a drought have a GAT make some dead or dried up trees
//addon Personally I like the Bridge.
One last thing if you post the actual level I'll show you what I mean other wise I'm to busy tonight to make my own outline of a stream with a drought. But I would be happy to give you examples with that.