Wow, did you produce a full theme song... and and 8-bit version of the theme song for this jam?! I'm impressed!
I didn't see anyone else mention this in the comments, so maybe it is just happening on my setup. First, when I start the game, I'm not given an option to "start", just "resume". Second, the button press zones were way off for me. I have to hover over a random spot about 200px to the left and 50px up from the button in order to press the button. It was like the buttons were anchored to the top left, but the button sprites were anchored in the center. Hopefully that makes sense.
I also loved all the effort you put into the intro.