Terrible terrible terrible game way to much grinding is expected for to little reward. Just go play motherload if you are looking for mining done right.
awesome game well deserving of my 5/5 my only complaint is that the first tutorial level should be a little more clear I wandered around for a while before I realized that the bar in the picture was the space bar. Maybe add the controls in the game instructions side bar or have the space bar picture in the first level have the word space on it.
5 star the last night level tips. Start with cutting out all the trees and place 2 or 3 towers on each side. Next cut the lighthouse then the crypt but save enough mana to use frighten on the first champion and any others that come. Next you can cut the ship down to 1 health but leave it around so you can gain extra money from the enemies it sends. Save all your mana for when the ninjas come out you will need all the fireballs you can hold to deal with them. When you are 1 wave from the final boss take out the pirate ship grab its gold and fight like hell.
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try pressing "numpad" on your keyboard