There surely should be such things in my opinion like:
a challenge in a form of some rats eating crops, storm, wind or other such stuff
bonuses in a form of some kind of helpful rain appearing randomly
trophies and achievements for in-game work done
a chance of failing to harvest crops and an random cash counter for them
That's all for my ideas for this game. For now 3/5.
I would fix a bit the gravity engine because always when i was drawing a line and changing gravity the smiley was flying somewhere else then he should or bounced 2-3 times higher then the point he fell from. 2/5
Ok. This a joke right? I don't know what You thought about when uploading that "game" or more like interactive information point&click but think twice before You place something like this on Kongregate. Have You read the terms of adding?
 "Run 2"){kind=icon}
 "Farm Fun"){kind=icon}
 "Touch Red"){kind=icon}
 "Free Prizes"){kind=icon}
 "Kongregate Avatar Creator CONTEST"){kind=icon}