Strange. On my PC, neither Edge nor Firefox had such messages. They quietly downloaded the file, and there it is.
I would have tried to make a WebGL from it, but in the jam there was no more time (I submitted 5 minutes before end), and later I assumed that the game would be too big anyway. Maybe it has the largest playable area of all jam games: I used a complete standard terrain of 1000 * 1000 units. Well, it's an open world after all.