I agree that the castle does look small. but that view was from far away. the door was probably as big as the one from KH1 when Sora Donald and Goofy tried to close the door to the heartless.
For me honestly i used a lot of curaga and 3 card donalds and goofys. i used a 3 card cloud once and used a lot of sleights. i used only 30 cards when i fought riku the fourth time and Marluxia.
P.S. This for me was hard because i only had 425 cp and my health was only one bar so dont blame me for having this weak advice.
There r some items that r a rarity to the game and the 100 acre woods have some of those items and those items can be a big help to u. especially elixer.
Flyff - just boring
Space Cowboy - lags a lot
Runescape - lvl up confusing
Maplestory - gets boring after a while
Eudemons/Conquer Online - do much pk
Audition - A great game!^_^