Hey Spelmakare,
Thanks for checking out Esoterica! That is definitely a bug and I know exactly where it is in the code -- haha. It happens because I hardcoded each event to dim the other lights gradually and sort of indicate better that something is happening. I will take a look at it once the Jam is over because turning the lights off was a late addition and I didn't consider what would happen if they were off and an event started (whoopsie!)
Also, sorry about that! When the event starts you are meant to do "tasks" which at the moment is basically just pressing 'E' on a couple objects and then flipping the lights back on. This will end the event and the sound/lights will go back to normal. I didn't have a chance to implement any sort of task hint system before the deadline (probably would have been some sort of glowing particle effect or just a task list). I'll make sure to put some more info on the game page so people are aware!
Thanks again!!