[1] red-1 one-over from RTG
[4] green-2 at LTG
[10] green-3 at RTG
  >>10, $456 at end
[18] red-3 one-above ARTG   (maybe sell the red-1 here?)
  >>20(hard gray), $6085 at end
[22] upgrade green-3 (to#2)
  >>22(fast yellows), lose 1-6 lives??
[25] Replace green-2 at LTG with green-3
  >>25(grey+bonus), $15062 at end
[29] Upgrade green-3-1
[30] Red-3 at one-down from TR3 +++ green-3 at ARTG +++ green-3 just left of LTG
  >>30(hard grey), $34320 at end
[31] Green-3 two-above ARTG +++ Green-3 one-over from RTG +++ TWO x Green-3 in the middle of the right-wall +++ Upgrade LTG, RTG, and ARTG
[32] Blue-1 at very top-right, the very bottom-right, the very bottom-left, and the square just BELOW the entrance  (the way the map is laid out, the outer row gets slowed down vs the inner row at EVERY turn, but we can help speed that up...
[35] TWO x Red-3 at TR3 +++ Green-3 along the right wall
  >>35, $60854 at end
  >>36, $76550 at end
  >>37, $96042 at end
[38], two red-3's on each end (left and right) of the island (in the middle row)  (for a total of three red-3's)
  >>38, $110k
  >>39, $137k
  >>40, $141k