Yea man, it's insane. I heard someone talk about it being good so I got to 50 to truly try it out. If you have the gobblegum that gives you ammo instead of money (can't remember the name) you're set for as long as you want to go lol
Same thing, just keep upgrading it until you get blast furnace. It's insane. If you don't get the wonder weapon you'll be good with the haymaker and a wall weapon :D