Looks nice, but some issues

Four issues:

1. Dragging a right-side power (assuming it is unlocked and you can afford it) sometimes does nothing. By the time you can try again, its too late. Make those buttons 100% reliable please.

2. Uneven difficulty curve. First several levels are nearly impossible to lose, then Volcano level 2 is suddenly really hard and frustrating.

3. The menu icon (which is the only way to see the Help that documents the towers) doesnt work until you hit Play.

4. Cluttered and hard to see. Retina graphics would help, as would toning down the yellow graphics for the coin power.

M A 4 about Ninja TD