Loved this entry. Time flew by while playing. Your additions made for a more engaging and rewarding experience overall. I love the hat and pet system. It kept me saying "one more run" to see what else I could unlock.
Early on I ran into my poo and it spread out shotgun style, and I thought that was a way to turn it into a projectile and I got really excited and tried to take out waves of enemies that way before realizing that's just the poo being destroyed. Not sure if you want to make that an option, but I was really pumped at the idea of having another way to rack up pokes.
My only suggestion for the gameplay, and doesn't affect the score, is that maybe you should have it so the reticle distance from the player doesn't extend beyond his actual poking range. There were times I poked way too early because I thought I could hit the enemy, but really he was just outside my range.
Great entry. I had a lot of fun with this.