Because this game is really good, you probably want to see SFH 3, right? Wrong, because SFH 3 just isn't very good. The graphics are worse, It's laggy, you have to manage a team instead of focusing on yourself, and the maps aren't as fun, and it's just worse. I recommend you don't play it.
I would recommend buffing the slot machine, because half the time I get poops and the other half of the time I get something bad, so I very rarely get the thing I want.
Here's how to kill Metal Blob Guys: when they are firing their lance dodge around it and attack it. It might take a few times to get it while it's firing but with armor (next to the strange reward makes you invincible against the lance. Armor is kinda like an extra life but dont touch melties with it on.