Thanks for taking the time to play my game.
I am normally guilty of using mouse input for menus, and key bindings to controls. This leads to a slightly clunky experience, so I wanted a mouse-only input this time around. You are right: in this instance, adding key bindings would've created a smoother playing experience for the loading and aiming sections.
On a side note, I did set the wrong version when setting up and submitting the game - I set v.0.54 to be shown instead of v0.57. So if you saw just an empty field and thought the game was over at any point, that was due to my mistake: the correct submission should've also spawned in enemies straight away when the field is empty in addition to a preset timer.