Thank you for playing the new version of the game. With the music changing back to the start when picking up shield, I intended on doing that. Was trying to go for an interactive experience and put a break up in the main song instead of just adding a sound effect. Think of riding the ride at Disneyland "It's A Small World" over and over again and being trapped on that ride with that ride's main song. You would need therapy after being stuck on that ride for a whole day with that continuous song loop! HA! Also if you listen real carefully, you'll notice that the whole song was broken down into segments of wave files. I did this cause I wanted to keep the game's file size as small as possible. Remember, I'm challenging myself here. Also the up arrow only key was for the one button achievement . For the shield, you temporarily can't pick up another speed boost or get another shield till after you're finished with the first shield power up has finished it's course. Once the first shield power up is over, you can then choose on getting a new shield or a speed boost. I intentionally set it up this way to keep the game from being too easy. Thank you again for playing this game and whatever you do, don't ever get stuck on the "It's A Small World" ride at Disneyland. HA!