Would be interested in feedback for my game, DECLINE.
It features procedural ship generation and infinite levels of increasing difficulty, with online high scores. A long game lasts about 15 minutes.
Touch-based controls only, which works a bit similar to a mouse: you hold your finger down on the screen and move as you drag your finger around the screen. The ship appears a bit above your finger, and auto-fires. There's no movement speed limit, and you can teleport across the screen by tapping for a minor HP cost.
I'm not quite sure what category of shmup it falls into: it's not a bullet-hell, as you definitely can't dodge all attacks, you have to focus on damage minimisation. Enemies/bosses/players all share the same weapon list, though the player is limited to 8 weapon-slots, while enemies are not.
Link here: https://play.google.com/store/apps/deta ... ep.decline
(v1.2.1 has some minor improvements & should show up in google play within the next few minutes, whenever google gets around to approving it.)
Major inspirations include Raptor: Call of the Shadows, and Tyrian 2000.
Gameplay Gif: http://i.imgur.com/eI0EWPg.gifv
Screenshot:

Let me know what you think.