This post was intended for my existing audience and I didn't expect for it to be posted on HN.
Anyway, now that it's here, feedback on performance is still very much appreciated!
The reason I'm not making this web playable despite being built using web technologies is that I'm targeting Steam for this game. Therefore, I need to make sure the game works well when installed as an executable on Mac, Windows, Linux.
There was already trust established between me and my audience so that's why it felt appropriate to tell them to download executables.
I understand why HN users not familiar with me, would be wary of downloading random executables from the internet. It's a good instinct to have!