Yeah it’s a really big shame about the web build, but the good part about it is that is a lot more playable than it was about 10 hours before release. It seems to take a while (about 30 seconds to a minute for me) but it will tend to smooth out after that, but usually with broken music sadly.
There is actually alternative controls with control and shift I believe (may have it wrong in my head). I definitely think those should have also been included in game