Bugfix Update
Thanks to everyone who sent reports, a few of the issues you flagged are now fixed.
Local Co-op Controllers
Fixed only one side of the log responding when playing with two controllers, or with one controller and the keyboard. Each player now controls their own side and their own camera properly.
Connecting a second controller after the level has already started now works, it gets picked up right away instead of being ignored.
The keyboard now stays available as a backup at all times, so nobody can end up stuck with no working input.
Reset now works from either controller, not just the first one.
Achievements
Fixed achievements not unlocking.
This applies to progress you've already made, achievements you earned before this patch should pop the next time you launch the game, so there's no need to replay anything. A couple of the skill-based ones will need to be pulled off once more.
Online Co-op
Fixed duck doors and spike doors not reacting on the joining player's screen, previously the spikes and doors only moved for the host.
Keep the reports coming, they genuinely help us track this stuff down.