Interesting concept, but gets a little boring in a few minutes because there's nothing new to do. It could use a few more enemies, maybe ones that shoot projectiles, and it needs to get harder with every turn. As it was as soon as I got chain projectiles I became basically indestructible, with a lot of health to tank his and destroying every pack in a few shots.
I don't know if it was my setup, but I had no sound at all, which really diminished the experience.