I’m giving it 5 stars because it’s better than 95% of the tower defense games out there. Kingdom Rush is the king of tower defense, but this is probably in the top 3 that I’ve played, and I’ve tried tons. The towers themselves are well done, upgrade trees make sense, and the game play is unique and interesting. The digging down and creating your own path makes for a fun change to the tower defense genre. For a free game, the simple ad banner at the bottom and lack of constant ads (as in, I haven’t watched a single ad in this game ever) is a refreshing and much appreciated change. My only negative critique is that it’s a little too easy. I’m over 80% of the way through the game and I haven’t had to try any level more than twice to three star it. The variety of enemies is lacking, though the enemies I’ve encountered so far are well thought out and each represents a specific challenge for your towers.I am finding this game many years after its release, but given how hard it is to find decent tower defense games, I felt obligated to write a review and hopefully convince others that this one is worth a spin.