A few weeks ago, I said to myself, "There aren't enough rhythm games on Newgrounds." So I taught myself how to make one, and now I can tell you firsthand that diving into complicated programming can produce many wonderful headaches!
After scanning the Newgrounds Audio Portal for many hours a day (which can actually be quite fun), I compiled seven different songs and synced them together in a rhythm game. It's pretty much just like Guitar Hero or DDR--you press a key when a note hits it, and in this case, there are four keys-- Z, X, C, and V. When a red note hits the red Z key, press Z. When a yellow note hits the yellow X key, press X, and so on.
The game doesn't really have anything to do with rainbows, except for the fact that the notes are the simple four-color rainbow (red-yellow-green-blue). I just named the game "Rainbow Rhapsody" because it sounded a lot better than "Rhythm Game."
I'm not changing the vertical layout >:(
Remember to look at the Options menu to change the quality and toggle the background's movement to lower the lag a bit, and if that doesn't help, try downloading the game.
Song progress is automatically saved to your computer.
And with all that said, I hope you enjoy the game!