THANK YOU! thanks so much for all the feed back. so much to talk about, I played your game and I was impresed of the level of polish I liked the details of the particles and the camera shake.
I definetly agree that the game needs some balance, I didn't have enough time and I'm planning to update that. Believe it or not the enemies used to respawn more quickly and you loose even more energy outside the light on earlier version jahaha.
About the effects a particles, yes! there are a LOT of things that I wanted to add (animations and particles effect, hit effects and more) but I didnt actually thought about the camera shake, thats a great addition to make it feel so much more satisfying, thanks a lot for including a way to make it because I haven't done that before :)
I really appreciate you taking the time to write all that, I'm going to make a version with some new stuff and without bugs, also I'll love to add more weapons and upgrades like movement and even shield, I have a lot of ideas for this.