I agree with everything you said. The spikes was something I was thinking about, and I sort of came up with a solution, but I didn't have time to implement it. This whole project was a race against time, since I pretty much only had my Sunday free to work on the game.
(Yeah, I have them excuses) :D
I'm gonna switch the background... When I made it I was already half asleep.
And yeah, I was hesitant about the music, since... it didn't really feel Nokia, but I'm terrible at composing, so... That is why I added a music-less download. I was planning to add an options screen, but ran out of time.