There is a small issue with the font Tickbird is using for XP values on some quests: any XP value over 1e9 causes digits to fall off the right side. Until this is fixed, please look for commas at the end of XP values - those XP values are at least 1e4 times as large as they appear.
As regards the maximum currency cap, you could always implement a secondary currency that is equal to 1e^10 and that automatically converts from potato to, say, sprouts.
True, although we are not working on this game right now, we are working on our next game :D thanks for the feedback/suggestion though, If we decide to come back and update this game further we will definitely take your suggestion into consideration :D
 "idleSlime.text"){kind=icon}
 "Tabletop idle RE"){kind=icon}
 "NGU IDLE"){kind=icon}
 "Speed UP Your Seksi Babooshka"){kind=icon}
 "SkillQuest"){kind=icon}
 "Idle Potato"){kind=icon}
no