I liked the minimalistic aesthetic in the game, and the use of the theme was good. I would have liked to see some variation in the levels, as opposed to it always moving gates. Maybe it would have been nice to have certain tiles that change the movement direction of the square, and you need to move the tiles in the way correctly to change the direction?
I also think it would have benefited from being more of a puzzle than a quick reaction game... with some added elements (switches, tiles that change movement direction, etc), the player would need to arrange everything correctly before moving the square.
Overall a good entry, good luck!