Hello.
What I like:
The music ( 2nd game in a row with awesome music, WOW )
The idea of the game. Making enemies shoot themselves is very fun.
The "juiciness" ( or juicyness, I'm not sure )
The SFX of when enemies are killed.
The effect enemies have when they spawn. So cool...
Suggestions
Make it so that when a "turret" spawns they have one animation and normal enemies have another animation.
Limit the number of turrets that can exist to 4. I got to 6/7 turrets once and although, yes turrets will kill themselves really fast, it can create impossible/very difficult situations to the player.
Lower the volume of the SFX when enemies are killed. When I got to 2500 or so points a bunch of enemies died and it was super loud, so maybe you could make it less loud?
Points should stop counting when the player dies.
Highscore:
Is this a good highscore? ( 3550 )
Conclusion:
Overall great game.