I noticed that there are no weapons that cause lasting damage. what if you made a weapon that caused 1-5 initial damage that could be blocked by the shield, and then the next turn cause a small explosion that ignored the shield.
also I think you should have a hologram. it would look like the person teleported, but instead it would create a fake bot that would act as a one hit decoy.
also you could add mines, it would be aimed at the ground between the players and the first person to touch it receives damage. it would make jumping more of an advantage and people could use the harpoon to cause the other person to activate the mine.

P.S. why are some paint colors more expensive? If it is more expensive at least have different pasterns. I would be willing to pay more for stripes, checkers, and rainbow patterns of color, but otherwise I will just stick to the cheaper colors.
I would also like it if we could paint drones.