Yes, I will not create new levels, but I want to polish this a bit more so it is more intuitive, with better performance, and cleaner code as well. I will not change anything while the rating period is ongoing, but afterwards I don't know if I can update this very same project or I should create a new one, I will ask the organizers.
About the sound, I just used a microphone and good old audacity :D. I was first writing the messages, then recording in audacity, checking the length, adjusting the message duration... A very manual process, as you can see.Most lines took me one or two tries, few took more than that, and I still ended up spending around 4 hours in the recording.
By the way, I also did many of the sound effects with my voice. Those ones still make me chuckle every time I hear them :D.