So that's where I've seen Yoko Littner for first time! At that time, I didn't recognize anything about her and I totally thought she was one of Matt Roszak's original characters. (Check this screenshot before voting this comment: http://prnt.sc/b0rxle)
I remember the good old time in December 2009 where I kept getting hit a lot of times in the first levels and didn't realize that it was a bullet hell game.
Since the Steel Samurai (medium) badge became the badge of the day for May 4, 2016, I remembered playing this game since April 16, 2011. (http://prnt.sc/b06fj5)
When the Watering the Lawn (easy) badge became the badge of the day for April 30, 2016, I remembered that game since I had first played it on November 29, 2009. (prntscr.com/ayp1vz)
TIP: You don't have to finish the level/stage to save/keep the Kongregate coins (after collecting these). You cannot lose the Kongregate coins by (collecting these then) running out of health instead of completing the level/stage.
I love to listen to the songs from the video games (and sometimes the remixes of those) when playing this game. Good thing I can mute the music and keep the sound effects in this game.
Today, I totally thought this game finally got a badge (this year) until I played this game and realized that I already earned that Power of the Cosmos (medium) badge on April 21, 2013. Damn it my brain.