Thanks for your feedback!
You are right about the audio formats, mp3 can only store whole bits or smth which is why it usually adds a little silence at the end, making it not well loopable. The audio used are .ogg though so I'll have a look into that. I was also planning on adding sfx, but I didn't find the time within the deadline.
We will probably slowly work on the project going forward to make it a small little title that's not as repetitive.