Tap Happy Sabotage is completely free, without ads or in-app purchases, so there's no excuses not to play it!
I took the game to Radius Festival in London on Friday, where it went down really well. You can see it being given a full work-out by Vlambeer's Rami Ismail and One Life Left's Ann Scantlebury at http://www.twitch.tv/radiusfestival/b/540285765?t=123m40s (I'm on at 2:03:40)
And of course, there's a new trailer up here, with some of the footage from this year's GameCamp and Indie Games Collective.