I ended up playing this game a few times before writing a review about it.  I was playing the demo version, so I was only able to see the first level, but I was able to play it on all levels of difficulty and beat each one.

This is a must have for anyone who likes tower defense games…cough…like me.  You could upgrade your weapons to perform better after beating each level, which I didn’t realize until playing a few rounds.

If the game seems to go too slow for you, hit the fast forward button in the top right of the screen.

Be careful not to let too many enemies through, or you will die.  For each one that gets to your base, you lose a heart.

Good luck!  I’m back to playing now:)