NecroDancer: Co-op mechanics

== BASIC MECHANICS ==
- Under default controls, player 1 is controlled with the arrow keys, and player 2 with WASD. Only player 1's keys can be used to navigate menus.
- If one player dies, they will be revived with 2 hearts on the next floor (unless their max health is lower, in which case that will be used).

== MUSIC ==
- The soundtrack selected for player 1's character will be used.
- Whether or not you can hear the shopkeeper singing is based on player 1's proximity to the shopkeeper.
- Whether or not zone 3 is playing the hot or cold music is based on the center of the screen's proximity to the border.

== CHARACTERS ==
This is what mechanics each character contributes to co-op mode.

Cadence:
- The zone 4 boss will be Dead Ringer, immediately followed by the Necrodancer, in any game mode. (It is unknown what will happen if the second player is Melody)
- Cadence is the only character that has a different base appearance between the two players. The secondary character's name is Choral.

Melody:
- Neither character can change weapons, since none will be available (except shrines, which the second player can use).
- The zone 4 boss will be the Necrodancer, in any game mode. (It is unknown what will happen if the second player is Cadence.)

Aria:
- The zones will be run in reverse if you are running a multi-zone mode. Dance Pad Mode will use zone 4 as well.
- Aria will die upon making an illegal action or missing a beat. The second player is NOT affected by this rule.
- Neither character can change weapons, since none will be available.
- The zone 1 boss will be the Golden Lute, in any game mode.

Dorian:
- Exits will always be visible while Dorian is alive.
- The second player can stand in Dorian's way and allow him to move only one square even with the Boots of Leaping active; this will not damage Dorian.

Eli:
- Shop walls will never drop gold.
- Neither character can change weapons, since none will be available.

Monk:
- Gold left on the dungeon floor will be collected when either player reaches the stairs.
- The second player is NOT subject to the "do not pick up gold" rule.

Dove:
- Neither character can change weapons, since none will be available.
- The second player can still kill enemies; this will cause Dove to cry but will have no adverse gameplay effects.
- The exit will always be unlocked.
- Bosses are skipped.
- The end of the song will kill BOTH players. (This surprised me)

Bolt:
- The beats are at double speed for both players.

Coda:
- See Aria, Bolt, and Monk.

Bard:
- The beats are removed for both players.
- Any time either player takes an action, one beat passes in the dungeon. This means all enemies move, bombs become one beat closer to exploding, and so on.
- If both players' movement keys are pressed in PRECISELY the same frame, it will count as one beat for both actions. There is no leeway for this mechanic.
- The song cannot end. It will loop if it reaches the end.
- Aria or Coda will NOT be killed for being idle. An illegal action is still deadly.

== ITEMS ==
Items will only work when their holder uses them. For example:
- A blood weapon will only get one kill closer to healing when the holder scores the killing hit.
- The Ring of Gold will only collect all the gold on the floor when the holder moves.

Some affect both players:
- All items affecting visuals will affect the single visual that is shared by both players, as long as the holder is alive.
- The Ring of Shadows' free shops effect holds for both players, as long as the holder is alive.

== GLITCHES ==
- If a player dies confused, they will revive on the next floor still confused indefinitely.