I wanted to include holding to move as it was the thing that gets most feedback about any of my games when I go with this style, but it was bugging out making the thief sometimes skip "turns" when player held the movement control as the guard. I will for sure learn how to program a proper movement system for my next games. Thanks for the feedback.
Oh and also, there aren't many assets, just the characters, apart from that, everything is made from basic shapes.