Very creative, live level design xD. Well-thought-out and intuitive puzzle systems, great job here.
Thing: due to the fact that the mobs are constantly running around, it is often difficult to place them in a certain position, adding to this the inability to plan in a pause, A LOT of frustration and lack of control are added to the game. A possible solution would be to add a "load radius" so that mobs AI will only launch when the player gets close enough, this also can tell player when placement will -1 to fair stat. (but this is just a suggestion). In general, solving puzzles in real time adds frustration, whatever you do, even with simpler ideas (I have a real time puzzle game myself).
The art and music fit, but the first is still in the prototype stage. Anyway, this is super fun and interesting, best puzzle game for me so far in terms of mechanics potential.
And yes, difficulty curve isn't really here xD
P.S. Don't quit working on this game pls :)