[v1.1.4]
Pairs with a lot of potential.
The orbs and signs fit well with the setting but I believe the atmosphere can be further improved with much more detailed gamedesign.
The menu/game art is good, the rewards are crap and should be currently crossed out (no context and too fast regarding erotic progression; animations horrible/not erotic). Instead, concentrate on a progression system that establishes rewards in the smallest way possible: The smaller and more longterm, the better. For example, Zelda could wear more (revealing?) clothes over time, more little animations during the pairing like lifting up skirt, turning around a little, friendly/naughty smiles or glances to play with erotism in order to distract you - behaviors possibly bought with rubies. This would implement an authentic motivation in itself: You wish to improve because you want to enjoy her looks while finishing the level at the same time.
Moreover, I believe the game should start lil' 'n slow and should advance to an entire screen of orbs along the way, perhaps multiple pages or harder signs (which you portrayed well). Reward so it's not meaningless but keep everything still longterm. In this connection, I believe the natural motivation to become better at pairs is given anyway, so there's room for enduring slow progress or frustration.
I also believe Zelda commenting on your gameplay ("good! keep going!") has a lot of potential for unique forms of erotism...
...in other words:
Add a story. There could be a roleplay reason behind the orb gathering, for example the cleansing of the orbs simply corrupting her or the character's thankfulness and insight that you perform better with an enjoyable erotic tension. At first, the characters could be shy or reluctant. But as time progresses, as you help people, as you defeat bosses by just gathering? Well, it could be a noble cause to play with one's own beauty.
(also: ntr/antagonist as optional protagonist potential. free will is more erotic than mind control but both can be crafted well)
In that regard, see sex more as a balanced conquest, not a goal: If you instantly get it, what's the point? We all love to see characters like Zelda because we grew up without any naughty effluence whatsoever, so innocence/civility can be regarded as a fuel or an ingredient for sexuality - an energy or reference that needs to be maintained at all times. Therefore, you need to be more careful of how far you jump and you need to build context or a believable "Why?", otherwise there's no real reason to play at all.
These are all just ideas about the potential to add more love or depth. I care for a good game and this is a great start
if there's a creator behind it who cares for it as well.
At last, I want to recommend a slight change of the brand/character.
Nintendo has a history of threatening rule34-developers of big projects like creating an own game. They have all rights to do it, although it's sad, I know.
Secure your project, improve the formula, add popular characters, do everything with patience and time and in the end,
it will be godlike, if you decide to care for it.