Pretty simple concept, add more stuff. Try a timed move, more power ups, different enemies. One more suggestion is to remove the white enemies, when the game starts speeding up they look like power ups. Nice start though.
A fantastic game. It reminded me of guitar hero at first but you don't need to get all the energy notes in this game. The retro style makes the game all that much better I think. I also like the original song, even with the strange lyrics. Great game DYOG, hope it does well.