Loved the theme of this game, really enjoyed the mechanic of getting bigger and smaller. Controls took a big of finagling at first to truly understand.
Personally, I would prevent players from being able to go off-screen, maybe partially off at the most, but to always be able to be visible
There was a bit of disconnect between bullets from enemies and my own/ally turret bullets on what could hurt me. So having a clearer indication of 'friendly' vs 'enemy' bullets would help (I know that is a tough challenge with a limited colour palette)!
Overall really enjoyed this game!