Oh my gosh.... 5 HOURS STRAIGHT AND I'M LOSING IT. Great game though! It has so many features and is awesome. I wish the music was more frequent though.
As an addition to my comment, in my case of leaving this overnight I get over 100 million jelly. Also here are suggestions:
1) Make it so that the button is useful. All I had to do is upgrade it once. If I click a lot, I get 10 per click and its worthless when stuff gives me 10k per second.
2) Make a "Medium" quality setting so that my computer can handle good graphics and not bad ones, and high makes my computer crash.
3) Make a side scroll for the achievements, it only goes to the end, half a question mark for the "Upgrade" screen.
Thats all.
Pro Tip:
If you ever have to do something else while playing this game, on some computers you can turn off the monitor and leave the computer running. So in that case, if your really addicted or attached to this game, leave your computer running over night. If you get a bit of upgrades, you get over 1 million jelly. I hope this helped :D