couple things
1. having the ball move in/out when you release the mouse button is horrible. at first i just thought there was a crappy delay between clicking and action, then i realized it wasn't bad coding but bad design.
2. annoying delay in between death and starting over. a game like this should have instant restart. no waiting for a screen to draw slowly or click multiple times.
i'm going to predict your responses to these
re:1 - "bla bla bla" <- some defense of making it when you release the mouse button that will fall on deaf ears for everyone because you're just WRONG
re:2 - "oh i'm so sorry it's so hard for you to click twice and wait a couple seconds" <- that is incredibly annoying when you're dying over and over again. if you can't see this then you should play super meat boy and see how good game design pays off.