Ok, sometimes I don't get it: the recently
released new version of DSDefense, DSDefense 2 has worse ratings than the original first version, although those games are nearly the same. The only difference is a new background of the main menu and about a dozen small improvements,
demanded by the players of the first version. Absolutely strange.
See for yourself:
on Kongregate, DSDefense 1 was rated 3.37, while the recent, improved version has a rating of only 3.12. Could be a measurement error, but it's the same same on Newgrounds: first version 3.92, second, 'improved' version 3.36.
WTF :)
If you add a version number, people expect (a lot of) new features etc. etc. If there are only few changes, they are disappointed and give lower rating.