I had some trouble figuring out how to beat it actually, not a phrase I thought I'd ever utter. But the game is absolutely gorgeous, and once I got going with the actual gameplay, quite fun and interesting.
What was used to export this - GLES3 or 2? In the future, I'd recommend 2 if it was not. I noticed it was a tad slow on my machine, which admittedly is a strong-but-still-POS Mac, but it generally doesn't run web-builds of GLES3 very well, and nor do most computers. So in the future, if you did GLES3, you may want to try 2 and see if it works any better. It didn't massively affect the gameplay though, which was lucky.