Very cool game! It fits the theme in it's minimal aesthetic along with an intruiging gameplay!
Good job!
imho any key that doesn't force you to lift your fingers already set on WASD - left shift, ctrl, V, B could also work, etc.
but again, it's really a very minor issue that pretty much comes down to personal preference; I never felt like the gameplay was hindered in any way by this.
n - from Time Weaver Team