It looks like the Steam version of Gravity Circuit has already gotten two patches that seem to fix some pretty significant bugs. I contacted the developer via the Steam versions forum, and they said that they're trying to get the GOG version updated, but it's more of a delay on GOG's side of things, because they don't have direct access to updating the way they do on Steam. Does anybody from GOG know if we can expect the GOG version to be updated soon? I'm loving this game more than anything else I've played recently, but it sucks to know that we're still on the launch version when bugs have been fixed on Steam.

EDIT: It's been confirmed that other storefronts will be getting the updates soon, so I apologize for my impatience. i just know that some games released on GOG in the past have been ignored after release, and I don't want that to happen with Gravity Circuit.

Looks like the game is getting updated on GOG as well:
https://www.gogdb.org/product/1201648069#builds