Hello! Nice game!
As mentioned in other comments, I would like to have better control of the aim or speed up the "auto turn" a bit. The upgrade on death was unexpected, I even reloaded the game the first time I "died" xD Especially because you said in the description "if you can hold out long enough you can be upgraded", I was waiting for upgrades over time, not over death.
It was fun and hard! And I'm bad at it! lol