Interesting concept, you gain health slowly, but the only way to gain currency is to lose health, by evenly defending so some get through but some don't. Good concept, 4/5.
@sirspikey dyes are exchanged at a ratio of 1:100, 100 white dye = 1 red dye, so it is basically telling you that you need 100 white dye to buy X upgrade
If you buy the whole board and get only 1 or 2 greens. you're done for. Reset if you get too many reds. Wait till the chance gets to at least 50% before buying anything. You CANNOT upgrade your reds to greens, or greens to blues ever, so you have to reset if you get a really bad board.
hahaha @frisbeedog. Anyways javascript miners inserted into a game with around 100k plays will still not generate much currency, maybe a couple cents, but regular computers can't mine very well. (besides, it would get taken down on kongregate asap)