This is a beautifully simple concept that actually has quite a bit more depth than I was expecting - was quite impressed with the different ways that you've found to explore the scaling mechanic. And the general gameplay had a relaxing vibe to it that I quite enjoyed.
For improvements, I think that some sort of visual indicator over elements in the scene to indicate that they were scalable would be helpful - this wasn't too much of an issue until the first hole to the outside of the building, which took me some time to realize that I could interact with. The audio/visual feedback of the "Object Blocked" might cause a bit of confusion, as I sometimes felt like I had to get an object blocked to proceed.
Other than that, solid entry with an enticing concept - interested to see what else you could do with it!