Very fun! Took me quite a while to figure out how to break/get past the first breakable wall on level 5.
I loved the feel of the levels with the mix of foreground and background elements. I found myself getting desensitized to loosing balls. The first level or I was trying to hard to get everyone to the end. By level 5 It became "take one for the team, the spikes gotta go". Would definitely play some more!