Board Thread:Off-Topic/@comment-25404524-20180209210110/@comment-34807853-20180303195730

Coins in PvZ 1 & 2 are the equivalent to Monkey Money in Bloons. Both are used to buy things in shops or power-ups (compared to buying specialty buildings, agents, etc., and renting premiums in BTD5 Flash with MM). Special Agent Shop and the Specialty Building Land are similar to Crazy Dave's Twiddydinkies in PvZ 1 - shops of the game.