Clearly needs more content, but I like the core idea of controlling the landscape instead of the platforming character. Also, it seems that the character slowly drifts off the cells he's supposed to bounce one... I missed a beat around 3.5k points and the blob just landed next to the spike and then jumped back up. It also seems like the pattern does change around 5k points with some spikes already being blocks. I would recommend moving that much earlier. At that point I was already convinced the game would never change and only kept going because I noticed the cursor and blob slowly drifted right on screen, so I wanted to see if they end up off screen at some point. :D

I like the graphics as well. Difficult game. I do think maybe some sort of feedback for when you've placed a block would be nice, might ruin the song, though.