I played your game, I liked some of it, and got confused by the rest.
So I got the light (I didn't realize you could do it right away), found the bag, dropped it into the chute, got to green corridors and then a cute cat assaulted me with loud music :)
Is that it? Was the cat the uninvited guest? What was the hammer for?
Also- congrats on your fist jam. I tell this to most first timers, but keep learning, and making games and you'll get good in no time :)
One last thing. Unity lets you make web builds. More people play web builds than downloaded games :)