Yay!
Jazz's grapple hook reminds me A LOT of Grapple Beam in Super Metroid. It's very fun. I enjoy acting like Spider-Rabbit, flying near below ceiling and bombing enemies with RFs or Bouncer. The booster is good when you're low on energy. At least on Battle1 3D, where there is a carrot. Weapons... I don't get what for the typical rocket launcher is. It's just 3Way with only one rocket. And you switch to it after respawn, which is quite annoying. Also, Spaz still doesn't have outlines like Jazz. And where the heck is Seeker ammo?