Had some fun, the game looks good. The UI is clear enough to know what is going on within the first few clicks without knowing the language, which is great! The game is too easy, though; the player scales too quickly (within the first few waves) for anything beyond it to feel like a challenge. If part of the appeal is that you must draw the route to the crystal, I think there should be some incentive (or enough challenge) to do so over just spamming towers.