I Am Overburdened is a silly roguelike full of crazy artifacts and a "hero" who has 20 inventory slots.
A sneak-peek into the original soundtrack of I Am Overburdened.
The composing tool used for making the music is visible in the video footage. It is called "Bosca Ceoil" and can be downloaded from here or can be tried online for free:
Boscaceoil.net