Easily the best game in this site! However, and take this as a suggestion, you should add an option that allows us to play against whoever we want. Also, create separated rooms in the Multiplayer section for each pair of levels (room for levels 1 and 2, room for levels 3 and 4, etc). Also, the game is a bit repetitive because of the lack of cards, but time will correct that.
Good job, Kongregate! =)
The hard badge was indeed hard! It's a fun game, but you need a lot of luck to grab lives. I figured that you'll do better in the game if you stop aiming. Just keep the space bar pressed and avoid everything that can hurt you. It took me about 20 minutes to finish this.
It's sort of a fun game, but there's a glitch: if you save the game and leave to the main menu, when you continue the game you lose your score. Just a tip for those who are trying to get the badge. Don't leave the game -__-'