Hmmm... I got twisted feelings about this.
1. The new block... it kinda looks like if it is something from space. (star stone, dark matter,moon-plate block, ...?)
2. The new weapons... a laser-machine gun, maybe another "magic-gun", AWESOME, i like mage weapons a lot.
The plasma-ball-thing in the beginning... a throwable wisp, maybe? (awesome!, wanna have!)
The meow-rainbow-sword.... (wtf, this seems more of a joke than an actual weapon, unless its an melee-version of the rainbow-gun, with some projectile changes, which would be awesome as well. the meowing though.... SERIOUSLY? this seems so weird and does not fit into the game at all... (imo)
3.The hook the player? with the meow-rainbow-sword? was using kinda looked like a grappling hook made out of ectoplasm, and appears to be able to let the player stand in midair, i can also see the player? wearing gold-dyed armor, i think. The player? might also be a new enemy/mini boss/boss, which would be cool, as there isnt really a hallow-themed boss.
Overall, i am really looking forward to the 1.3 update, but i am still a little bit concerned about the meow-thing.