A fun concept, but with many technical issues. The screen starts off so small that you can't read the text. Pressing Z makes it get bigger, but with no way to make it smaller. I assume that this wasn't intentional. The core gameplay of launching the ball is pretty fun, but extremely difficult. I struggled to even make it past the first screen. Not a bad effort for 48 hours, though. Keep it up.
Instructions were unreadable with such a small (and un-resizable) window. Another problem with the small window size was that you end up clicking off screen often because the controls make you click and drag away from the window. I lost far too many games this way. Overall, I enjoyed the game, but I'm not quite sure how this fits the theme.
Really nice game! The physics felt weird (mainly too fast), but once I got used to that, it was rather fun! It did make the first level harder than the second and third. I reached the fifth level, but it appeared to be exactly the same as the fourth one, so I stopped there. Also, you should probably update the controls, as Z is used to change screen size and R to restart. Other than that, great entry!