This was fun! I think a lot of the difficulty came from having to press up and down at the same time, since I normally use my middle finger for both. I'd love to have the score shown at the end even if you lose, mine was around 400,000 but I wish I knew what I ended.
I think it would also be great to have some visual of how much progress you've made on destroying the building, the screen shake for every 25 combo is awesome but then there's no way to know how many more you need to hit.
Other than that I enjoyed the game, the character dancing was awesome.