Hi, we're glad you liked the game overall, and especially the graphic design.
We have some ideas to expand the game, but we still don't know exactly how we'll go about it.
Most of the sound was made over two afternoons, where we had to record everything, edit, mix, and test it in the game.
All the music was composed by us, as we never use external resources (except plugins). They're simple melodies that never repeat for less than 8 bars, and that's a design choice since it's a really short game. In fact, there are melodies that never get fully heard during the game.
Thanks for your feedback!