A very clever hybrid of Spirit and Tilt to Live!
I love how you can both take your time forming the loop (unlike Spirit) and how the loop line actually sets up a wall so you can sort of bounce/herd ships into one big group if you so desire.
The power-ups, for the most part, are cool weapons that will let you take out enemies directly as opposed to being stuck only looping them. So, just like Tilt to Live, getting points is all about building up your combo via massive loopings and some firepower to keep the combo counter going until your next massive looping.
The gameplay in the free version gives you more than a taste, as far as I know it is the full game but missing some of the power-ups and some ads in between sessions. For only $1 you'll remove the ads and get 4 new power-ups, including my favorite so far, the heat seeking missiles!