I played this game on stream: https://www.twitch.tv/videos/2565553540?t=00h36m11s
The game is addicting! However, it seemed like it was better if I didn't shoot anything and just avoided the projectiles, and wait for the enemy to kill itself, or for me to reach the end. Partly/mainly because my shots can also damage me, so I ended up killing myself faster if I tried to shoot.
Perhaps have the player's projectiles be a different color and disable friendly fire?