Overall feels pretty polished.
The radio code isn't well audible.
Too few of the elements are actually necessary, [spoiler] I could very well see someone see the MhZ value on the painting, directly going to the radio and finishing immediately without seeing any more of the game. The clues aren't that useful compared to just trying stuff.
Thank you for your feedback! That's a great point. You could instantly go to the painting and finish the game. I wanted to focus on graphics this jam, so I kept the mechanics to a minimum, but you are right, if I am ever going to extend the game, I am definitly going to pay attention to that! User-Feedback is so valuable sometimes ;)