I'm very glad you enjoyed it! I was considering a toggle for the shader, but it seemed a bit flat without it. It's a simple add, so I should just do it anyway. I've not heard of QE as a double turn - I'll look into how to track a double keypress input on Godot, probably need to create some kind of keypress buffer. Thanks for playing and the kind words.
I think the method is is_action_just_pressed() if I remember rightly just tracks a single keydown. I probably should have worded it better as in if I held Q or E for more slightly more than one frame it double turns, as I assume it does 1 turn and then is still registering the press without a keyup and gets fired or goes into a buffer.
Super minor anyway :D. Thanks again.