There seems to be an awful lot of very bad contraptions by a small number of individuals gumming up the Other Players' Designs section. Maybe only save limit or, at least, a publish limit?
It's frustrating trying to view different designs when three or four spammers clog up the first couple dozens of pages.
As for other feedback, being able to sort those would be nice. Date, rating, number of rates, number of pieces, all that jazz....
Anyway, great game. Only played the flash version 'cause that's all I can afford but think I convinced a friend with an iPad to get it. Hope to see more!