It looks nice and it is challenging, but for the life of me I couldn't figure out how to patch the holes. I kept dropping the patches and when I tried picking them up and moving them the robot just dropped it again or dropped a new patch.
I think you may be the first person who figured out you could drop them :) You should be able to right click hold and drag them but I think I introduced a hitbox issue for the selection box at the end making it much harder than it should be.