OP here and i bring more info, which are finally good. Many of this is gathered from Discord.

RNG is the serious problem that devs want to fix, but it's really hard, so don't expect this soon.

Once per date you can reroll your orbs, another use is 2 diamonds, don't know if the price increaces with more uses.

Price for increasing memory with in-game cash stays at 2k and do not increase further.

Tried to stay with game, and so far it's pretty good. While game has it's flaws, it's more playable than before.

Also, if anyone is struggling with dates, because of RNG or other reasons, few tips:

-more times you pop the orbs on screen, more they give you, at some point being more efficient than making them drop (of course dropping half of pool is still great, just if you can pop or make fall with same result, choose first)
-you gain points per bounce, and that value increaces with every turn in which you did that. That made me sometimes get 3 hearts before the end, it's seriously good
-third and fourth daily reward is yellow line orb (destroys 3 orbs on left and right) and green "flower" orb (same as yellow, but also 3 up, down and diagonally). Don't be afraid to use them if you're kinda dead, yet than one orb will save you
-for now house stops being important after hitting 12 lvl and getting furniture for all girls. You just get spend moneyto exp bonus, to get more exp, which gives you more exp...