Apparently, I had made a mistake where everything electric in State-5 was using the sprite of the volt gun ammo, so working on the lightning gun by itself messed up the sprites for most of the rooms I had made so far. I fixed that. I also added the finishing touches to the mini-boss you have to fight in order to get the volt gun. Next is making how it works, I think going through walls isn't such a big deal especially if it's slow to fire and doesn't do much against single enemies.
Time spent on the project so far: 437 hour
Currently working on: Making the volt gun and fixing some sprite errors