Thank you for the feedback! I actually did not realise it was Brazilian music - I was going for corporate/elevator music. But glad to hear you enjoyed it :P
Yes, that is a great suggestion, and something we were battling with too. We felt that we had to limit how many times people could use the detectors, to avoid trivialising the game. Exploring the time option would be interesting too, since we want people to enjoy all the tools.
Thanks again :)