With 15 minutes to go, I had this idea:http://www.fantasticcontraption.com/?designId=11400378
I tried to get it tweaked in time, but no luck.
Thanks for the fun comp, jdel. I really loved watching everyone else's solutions, especially jompy's flicker for Awe and cooljenny's sweep for Dam. Looking forward to playing the Hap Master's with you and Cruiser as soon as I am done designing a level for it