Geometrical hitman: The first hit

An entry for Reload magazine X In the keep minigamejam, done within 60 hours, using EFPSE engine. The entry required to have an unique health mechanic, so i came up with this idea =P Youre a new hired hitman, you needed the money, but you hate killing people, so you decided to create a homemade drug in an attempt to make your job easier. It works! Now, all of your targets looks like geometrical shapes, which makes things easier for you, but theres a catch. Of course, whatever the things you put on the syringe, made it poisonous, so your health is slowly draining down second by second. So, you ...