I have a few more notes now that I played it again: if you decide to make post-jam updates, consider allowing the player to HOLD the mouse button to fire. Also I'm not 100% sure if you can get hurt by the plus symbol animation when enemies spawn in but it felt like that to me.
You can indeed get hit by the spawn animation, but the hitbox is tiny. I've thought of a workaround so you can't get hit by it. Thanks for the feedback, it's valuable.
