another thing is that in Kirby Crystal Shards, Kirby always freezes when I use an attack and I have to start the level again for Kirby to unfreeze and that is very annoying and makes it unplayable what can I do?
Well we already talk about this in a topic two months ago.
I don't know much about this game, but maybe if you disable couple of speed ups of the game, you might avoid crashes, but the game will go slower.
Back to topic: Just don't worry about Zelda. Did you try the game on the old rev of Daedalusx64, I mean look in the improvements that had been made and more if Super Mario 64 is fast... every game might be fast, but for Daedalusx64 they'll have to do more work.
P.S: Continue the excellent work, BTW if you guys need some help anything let me know, but if you're asking me for the coding...well I'm only a 12 year old boy.