Hmm.. I think all of them could be turned into good, complete games, given enough time and effort. Was there a specific reason for canceling them? Is it just part of your creative process to try out game idea until something "clicks"?
yes most of them didn't feel fun while playing , thy are either easy or too complicated to play or not fun at all , some of the mechanics and levels needed to be reworked from scratch
by that time it was vary hard to rework them as i didn't have time to go back again !
