I've never used any animation tools, and it's been on my list to make a few basic logo animations in css/js. It's striking how many features you guys have managed to ship in a webapp and I'll definitely play with Construct Animate in the near future.
Also want to say that the tutorial/walkthrough is excellent, and gave me a great impression of the core functionality in under a minute. Without the walkthrough, I might spend the same ~30 seconds being unenthused about the UI elements, which others have pointed out have a distinct mid-2000s appearance that I personally don't care for.
Good job :)