I really enjoyed the mechanic that the background music fades out until only the instrument that the watermelon is playing is at the forefront. I also like that the tempo and animation speed increases as time goes on.
I like the blocky looking graphics, as well as the design of the watermelons. The ending screens were funny. The combination of the characters and the music make it feel the ending of a detective-comedy film. The music is spot-on for this type of scenario.
I did have an issue with the hint: I initially misinterpreted the hint as listening out for misplayed instruments or that their hand movements were not correct. That led to a failure to accuse anyone and then a false accusation. It took a few attempts, but I eventually found the actual clue that led to the imposter.
A possible improvement could be to speed up the rate that a person's instrument is isolated and also make it slightly louder when you inspect them, as it took a while to figure out the difference in sound.
I had a slight issue when I couldn't look around properly when attempting to look away from a suspect, which cost valuable seconds.
A quick-fire deduction game with a dramatic soundtrack.