Is this worth the $7.99 purchase price? It depends on whether you like tower defense-style games or not. Despite the overa thrown together feeling, the game play is quite addictive, and the game still looks and sounds nice. This title has become my go-to game for travel, cab rides, and waits in line. Destructoid would recommend that you try the free trial version to see if you'll have any issues with the faux d-pad control method. If you're okay with it, you'll likely find hours of fun within Crystal Defenders.