Not bad, it was interesting and difficult enough to keep me interested through all five levels, the design is sound but perhaps a bit simple. It fits the theme quite well. Could use some further exploration of this mechanic, maybe some additional twists. Overall it was more fun than I was expecting.
My main complaint about how it is currently is that it’s kind of important to be able to tell exactly how much space there is between all the graphical elements, and which square of the grid they belong to, but with these assets and how they’re arranged it can sometimes be difficult to estimate whether there’s a walkable gap or not. This can sometimes lead the player to be punished for mistakes that feel unfair.