The game crashed for me (on Windows 10, 64 Bit), but attempting to run it full screen as suggested by Xelanybor seemed to help. It still took multiple launches, but it eventually worked and I was able to play further without issue. It is potentially something related to the Windows build as I tried a few attempts on Linux and had zero issues there. It would launch without fail every time!
As for the game - this is pretty neat. I found the concept of a survival game somewhat daunting, but you've made it work here. It's a good entry!
I did find it a little confusing to figure out which rocks I was meant to collect. I went toward the left at the start, but all of the rocks on that side of the island seem to be ones that you can't interact with. Perhaps a bit more distinction or some kind of indicator on what you can interact with would be helpful?