Imminent - Defend Your Tower Game

Mike Mass from Games on the Web posted about this cool game named Imminent. It's a defend-your-tower game like many other on the web, except this one got me stuck playing it for hours!
As Mike already noted, the game's pros are the numerous different enemies, the upgrades you can make to you tower and the music.
There's a con I have to mention though: No sound effects at all! You release so much fire-power from your tower, but there's not a single "bang" or something coming out from your speakers. Too bad...
Click here to read Mike's post.