I totally missed the upgrade button :(
For the more blood thing, I probably bugged it out because I clicked it two times before the game loads and there were no quest info on the right side.
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hmm maybe, I am not sure :D , also you can press "L" to open-close the quest menu
sorry about the inconveniency, I missed to add a limiter bool for pressing more blood button, my bad.
and I had to make a better tutorial, again my bad. I added everything about leveling up few hours before the submission ends :D