Good but needs improving

This is a good point and click defense game. It has a nice variety of enemies, and I'm glad that it's actually got levels, and it's not just one of those ''Get a highscore'' games. Also, that's some nice music. Now, onto the improvement bits. Yes, as you said it needs more levels but I know that you will improve the level number in the next one, so that's fine. Another improvement is that you could improve the graphics a bit, but still keep it simple because that's the style of the game. My last improvement is make the levels a bit harder, and because of this, add lives to the game. Here is a quick summary of my review:

+Nice variety of enemies

+Actually has levels

+Good music

-More levels (I have read the description)

-Graphics coud be improved a little

-Increase level difficulty

Also, an idea for the next game. How about bonus levels?