also bug reports: the blood after you buy the +5% blood upgrade blood won't drop anymore until you get it to lvl 20 and for ink too it doesn't drop till you max the upgrade, the max hp regen doesn't apply or if it does it's based on the max hp you had at the time of the upgrade buy so since for me it was just 15 it was unnoticeable once i had 700k max hp lastly the attack speed upgrades often are invisible and you need to upgrade an unrelated upgrade so that you can go back to seeing it in order to upgrade it