I had quite fun trying it out. It would have been nice if the stats on the units showed up or was explained (e.g. this one shoots). also if the milk-producing thing (both mine and enemies had health-bars). And it actually took me a little while to understand that the game scrolled sideways (so maybe have a small HUD or so showing the entire field and where you are looking at it).
But as I said, I had quite fun playing first level and half of second.