Wow, this is one of the best designed games I've played so far. Gaining ducklings makes your tail longer (and dodging harder), but increases your dps, and gives you an opportunity at a health trade, so you're incentivized to do something besides gun down the boss the whole time. Very nifty idea. I felt the tank controls were a bit wonky -- I would have preferred to aim the direction I wanted to go with a mouse since I wouldn't have to flip left/right when going down (and I think this idea lends itself well to a touch interface, so it would be really cool to see on mobile). Also, I didn't see that you could should with space until defeating the the first 3 bosses through ducklings alone (but that actually was quite fun, so maybe even consider removing the shoot ability to focus just on movement). Very nice polish and boss designs too, kudos :)