Haha, this game reminded me of when I was a little kid playing the Atari... oh the old days...
You had me playing for quite sometime -- it is fun. But it is missing a touch of... danger I think.
There is no consequence to getting hit or miss hitting, so it doesn't feel as if it matters. As mentioned before, I could just keep running and not bother till I reach some high score. In other words, there is no urgency to kill anything (specially when score is based on distance?).
I didn't hear any music but when the line passed me and I am near the wall, I started hearing music. I'd rather that you have music at all times but make it danger like when the line passes you.
I liked the charging mechanics and the graphics... its simple mechanics... there is nothing to hate really
. Perhaps the only thing I didn't like was at first I didn't know what that line is and I thought I'd day if it passes me but turns out it is when I touch the wall so it was a bit confusing
.
Really good work and good luck with this ^_^