If your having trouble. Don't take the initial mana 'upgrade' all it does is prevents you from having higher regen at max. First game I bought max ranks after day 4. I then nose dived. Mana Regen without Initial Mana = win.
It might be alot of fun if the hero altar or the tank actually did anything. For awhile I even got a bug where it would be sending the tank that I didn't even buy, and sending no other units. Its not a bad concept, but until the bugs worked out its just not fun.
I didn't really like that the turrets would randomly dissapear over night. Sometimes they stayed, and sometimes they didn't. Kind of annoying. :/
Other then that thumbs up.
A fun game, but the sniper achivement isn't really plausible. I got the hunting rifle the 4th day, and used it for almost non-stop headshot the rest of the days. With still no bade. :(
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