Start with two upgraded Banana Farms. Click the rainstorm ability to water the farms and get extra cash from them. No money for Bloon pops however, so manage your cash carefully!
The map takes place in a very dry environment, with no vegetation at all and a few rocks. The track, which is a simple, nondescript trail, follows the graph of a sine wave, first curving up before turning around, curving down in much the same way, and returning to the exit of the map due east, slightly south, slightly longer than, and parallel to the entrance. A large rock in the bottom left of the map can provide elevation differences.