The game seems quite fun at first and is incredible easy and intuitive to play. The problem however is that it lacks any depth whatsoever. Tower upgrades only improve one attribute of the tower and enemies dont seem to get mixed together, so it gets quite boring. Another problem is levels seem to go on forever just sending easy enemies towards you. It would be a decent casual game for a phone or tablet, but on PC there is no reason at all to play it when there are so many better TD games out there.