Click on the green dot then on the pop up menu to buy/upgrade it
This is version 0.1 there is essentially no strategy currently. Comment tower ideas/suggestions Some tower ideas that I'm planning on adding Brute(Infinite damage 1 peirce garbage range and speed) Slow(Slows enemies ok range no damage good speed and pierce) Money machine (No normal stats just makes money) Cook(No normal stats buffs towers in range) Summoner(increases stats while enemies aren't in range) Neutralizer(Hits as many targets as it can till it runs out of damage) Ranger(infinite range good other stats) No tutorials used
