Definitely worth a look. Unusual take on the twin-stick genre: you control a static and vulnerable turret that shoots with one stick, and an agile, unarmed but invincible ship to collect ammo with the other.

The finite ammo initially seems to be the mechanic to beat, as it starts out very scarce, but as long as you're careful in the first couple of minutes of gameplay you'll never run out later. The most interesting thing is that the turret can't shoot through the ammo crates or your own second ship, so you have to collect them before they accumulate. After a while you actually get hemmed in by the pickups your own shots have created, and that places more emphasis on how to use the mobile ship. Since it's invincible you can use it as a shield, but that slows it down and stops it clearing up the ammo drops. A tricky balance.

It's a limited experience - there are only a handful of enemy types and the difficulty seems to ramp up pretty much linearly over time - but it's a cool concept and very nicely presented. One easily-fixed criticism I have is that the gamepad rumbles whenever you shoot, i.e. constantly through the whole game, which got uncomfortable after about five minutes.