Banzai! v2
The most innovative use of current I've seen yet. Aptly named (and spelled right, now). A really, really cool small map. Check it out! (You might need the map view to figure out what's going on, if you're facing the wrong way...) Update adds a few tweaks. Send films to the author. Do it.
Levels in map "Banzai! v2":
Banzai!