1.

Stack into a Totem (3 Links stacked) to reach high areas and combine power.

2.

Communicate with Deku Leaf emotes — there are no voice channels.

3.

Outfit bonuses dramatically affect gameplay — Sword Master Suit boosts attack, Kokiri Clothes boost bomb power.

4.

Den of Trials (final challenge) has 40 floors — bring your best outfit.

5.

Single-player Doppels can be directed with items — Bow Doppel is most useful.