Thank you for your kind words and for playing!
We're super thankful to tfx, he provided that track for us last minute. I fell in love with his music and hope he'll lend us his talents again in the future.
Adding crashing sounds was on our to-do list but we ran out of time before we could figure it out.
The key spawn system works by getting all key actors in the level and unhiding/enabling collision it, otherwise they spawn invisible by default. It just grabs a random number and shows one of the keys at random. This way it's easy to add more hiding placing, you just drop more key actors in. Let me know if that makes sense!