This bug is only showing up when starting a Campaign game. I've gotten the graphics settings dialed in to have consistent 60+ fps. However, the game's physics engine seems to be running at an incredibly slow rate - it takes 30+ seconds to run from the drop ship to the elevator, and the elevator takes over a minute to ascend.

When starting a Custom game where you begin on the bridge, things seem to run at a normal rate, although it's hard to tell if there's a slight bit of game lag still. Still, the game is playable - the Campaign mode is most certainly not!

This is on a 2019 MacBook Pro 16", 2.4 GHz 8-Core Intel Core i9, 32G RAM, AMD Radeon Pro 5500M 8 GB, running version 1.0.1 from Steam.