Pretty fun game! I enjoyed the risk/reward mechanic where the more I shot the more I kill enemies and kill myself because my bullets have a really long lifespan.
The shielded enemies were also super hard because they always face toward me meaning I have to shot them from the sides. This makes me have to predict where my shots will go meaning that I often miss and the shot will eventually hit me. I think that if the shield enemies just turned toward the player a little slower then they would be much easier and fell more fair.