Thanks for the feedback!
Since this is my first jam I decided against using any assets I didn't make myself, which meant fiddling with audacity to make the sound you do hear in-game, but that's the upper limit to my skills when I comes to sound design right now. Pre-Jam I had an idea of making a song using a kazoo, but it would probably not have been worth the time nor would it have fitted the game's style.
In my eyes feedback for the player's actions (including with sound effects) is more important than setting an atmosphere / ambiance through music. Nevertheless it probably would have been great having both!