Hello!
Looks to me like a great idea, and the execution is very nice, too! If I was to point at something to improve here, that would be the "shacks" - the material they were constructed from looks out of scale - I especially mean the planks. If you take your literal two by four (inches in this case) and do the math for scale (let's say 1:35) then you'll see you get a pretty thin piece. Two by four would be about 50 x 100mm, that gives you roughly 1,5 x 3 mm piece - quite tiny, right?
I like the water filled hole a lot, too - what did you use for water here?
Thanks for sharing and have a nice day!
Paweł