Yes you did a Good idea with locks and keys and it looks (you have/to know/or to play it) a bit lilke
Brackeys Dicso Dj Shooter that had source, therefore programmed now work with keyboard for 2 Players.
Updated with Unity 2023 WebGL, perfomant slide, menu and 2 Player shooting game. Play it, For Your Comments do it in game: https://investus.itch.io/duel-discodj-shooter
To Play free Game in browser/itch: https://investus.itch.io/duel-discodj-shooter