Apparently Unabara
said they still have plans to update the PC version. Not much more details.
The demo locks both characters to one spell card, "Fantasy Seal" for Reimu, and "Stare of the Hazy Phantom Moon (Lunatic Red Eyes)" for Reisen. It's also unpausable, making the skill lists inaccessible.
Kunekune:
During an Occult Attack, Reisen pounds a mortar with her pestle (can cause damage), and the mortar stays on the field with the kunekune. Being within the kunekune's effect range or firing bullets through it will increase Reisen's Lunacy Gauge, and leaving it will deplete the gauge. When the gauge is full, Reisen becomes powered up, increasing the ranges of most her projectiles.
Reisen's specials:
5C: like Disorder Eye, splits into clones towards both sides.
2C: like Illusionary Blast, shoots out a wide cone-shaped beam.
4C: shoots out a large, high-speed bullet.
6C: like Disbelief Aspect, splits vertically into clones who shoot together
8C: throws out a crate; input 8C again to detonate the crate, splashing toxin that poisons the opponent (damage over time).
Her Weird Last Word is a full-screen attack.
In overall, players say Reisen is at least harder to use than appears in last week's footage, and maybe downright weak. However, ZUN seemed to have actually
said on stage today that Reisen is weak and should not be a strong character, so this may be lore-mandated. In any case, she can only become stronger in balance changes, right?
Sources:
1,
2