I got hit by an invisible triangle. Serious, I was staring at the mouse screen and then I was hit by a triangle that was still invisible after it hit me. I was so close to the badge too.
I love the song, it was in Burnout Revenge and I absolutely love that game.
This however, good for your first game. The collision detection is a bit off. Make the spike balls smaller, and make more of them as your score gets higher.
 "- Shape Invasion -"){kind=icon}
 "Extreme Heli Boarding"){kind=icon}
 "The Idiot Test 3"){kind=icon}
 "Asteroids Revenge III - Crash to Survive"){kind=icon}
 "Triangles"){kind=icon}
 "Bloons Tower Defense"){kind=icon}
 "spike dodge"){kind=icon}
 "Bet What You Want"){kind=icon}
 "Square Nine"){kind=icon}
 "Anti-TD"){kind=icon}
 "Balance Balls 2"){kind=icon}
 "Battlemachy: Jade Bandit"){kind=icon}
 "My Sweet 16"){kind=icon}
 "Critter Cannon"){kind=icon}
 "Bugs"){kind=icon}
 "Zombieland"){kind=icon}
 "Fatboy Frogger"){kind=icon}
 "Drawman"){kind=icon}