Thank you so much for your feedback :)
I have gotten the enemies attacking the player for behind feedback quite a bit, and honestly it was defiantly a problem to solve. My next update will have a mini-map to help fix this issue! I also pair that with some way better audio queues for enemies approaching behind player. I had some in it, but they were not that good lol. I hope that will fix that issue!
The enemies actually spawn from spawners which randomly spawn around the arena! But those can potentially spawn behind you. I am adding a better distinct audio queue for those now, and maybe a special marker on the minimap.
Nice feedback there! I will add more effects to make easier the enemies are struck. I added a hitflash and hit sound effect, but I think I need some more. I will adjust the effect, change the audio a bit and add some particles to make it easier to read and some for enemy death!