Put your circles farther down the track, then your lines, then triangles, then the rectangles closest to the start. don't forget to upgrade.
Try the death arena. once you get a few yellows around you, you can go for a while. upgrade size and Mass. dont forget you can buy more health.
Get the rings, adds one point for every one you have gotten. bollons stay at 10 points.
Work to level 31, everything is unlocked then. maxed out banana farm puts out $2000ea.