The idea is so great!
The game could use sounds, there is currently one sound and that when they see you.
Another point is that the controls is a little bit hard to control. Maybe make it so you move left between the lanes if you press d and not w and d.
The game art is awesome! Even though everything is almost made out of cubes the texture make them look so good.
I have a game jam and the theme is your the monster, hope you don’t mind if I borrow your idea?