A maze game without sight, I dig it! Constraints of a 48h game jam aside, this is a neat concept and definitely has potential to roll into a game once there are some other mechanics at play. Maybe add a time limit, game over on wall hits and sonar as an expendable (rechargeable?) resource. That way there is incentive to try and go without sonar to beat the time but a repercussion for not using it. Cool cool cool.