Simply a great game in the tower defence genre, the content is enough to make you play for a year(with breaks) and you don't have to watch endless adds either. The speed is fast and it rarely glitches. The guild makes you talk with others which is pretty impressive for any tower defence game that dosen't has a online pvp. I do have one recommendation though: you should add some more heros and some more expensive ones too cause it makes you want to collect them even more.