Thanks a lot for the feedback! Visual timer for the ability is a very neat idea and could be implemented easily, we'll look into that.
For both music and sounds, we were lacking time and experience. As with the hand example, it's not that the sound is misplaced, it's the absence of sound for the "hand is coming" bit. It was very close to the deadline and I was unable to find or create something suitable. We are planning on putting some additional hours into that after the jam rating phases end. Like the "ability is charged" sound indicator, etc.