Interesting concept, i would have preferred to have more of a goal, as i stayed on the bottom and shot lemonade constantly (no need to move around), got to 500 then gave up as it seemed never ending.
I believe having a goal as in, each "level" serve a certain amount of lemonade to people, but also have people who you cant serve lemonade to, so you cant just spam space... and maybe every once in a while add a fast moving "karen" that if they dont get there lemonade by a certain point, you lose.