Algodoo

Ok. I hope I do well on this one.

The killer used secret tunnels which linked all of our rooms so he could know what was going on between everyone. Once, Hot Sauce and Pinky Rose planned their escape, the killer knew he had to do something. Before dinner, he rigged bombs at the gate at the right time so Hot Sauce and Pinky Rose would explode when trying to escape. When they escaped and everyone ran, Magenta tripped on the steps making her weak. The killer dragged her inside and put her above the trapped door. The killer also put the silent gun underneath the body. The killer rigged the trapdoor to open once everyone else got back to the dining room. Magenta was also forced to drink chloroform so she would become unconscious.

I think the killer is Rainbow ( not pastel ).