New "Get the Gist" Defender's Quest
Tower Defense meets RPG in this really fun indie game. I'm not a huge Tower Defense fan and saw them as tiny time-sinks that I rarely played, but this is a great mash-up with a story. It's kind of the "PuzzleQuest of Tower Defense games".

They did a great job creating this and even if there are other RPG+Tower Defense games, I think they really hit the nail on the head with the features and specific gameplay in this one.

You can level-up, gear-up, customize characters a bit by spending points on skills and raising those skills, on top of enjoying a good story with nice pixel-art graphics and good-enough music.