The controls ironically look natural to me because it feels like underwater... I just use W and swim with mouse and it works fine. Luckily the area is not too large so I am able to guess where is the mural area ^^
Thank you for completing the game! Mouse/keyboard is my primary way of playing games so its super natural to me too, but also when I'm making these game jam games, I'm playing them constantly, so I have a hard time knowing how others will take to the controls!