Finished hard with no lives lost. Bomb and monkey to start, and from there it's pretty much bombs and tacks. There's really no point in upgrading the towers, since they cost almost as much as building another one, maybe more if you do both upgrades. If you need to use more than 2 tacks in any single level for the first 10 or so, something's probably wrong with your build. Enjoy the lag!
 "Bloons Tower Defense 2"){kind=icon}
 "Ancient Origins{flying fish}"){kind=icon}