Hey try my fresh level, y'all:
Electric Dance
To play this, hit the \ key when you start up N. Then, paste the first block of code into the level code box (the upper right one). Then follow the instructions on-screen. Same for the demo, with the second block, in the demo box. Make sure your caps lock key is on, or the game will be paused.
It's really annoying to reset in debug mode if you die. Hit \, r, p to reset.
Oh, and the new version of N has an annoying feature called Boss Mode. If your screen is all grey, hit the CTRL button to turn boss mode back off.