I haven't heard of a whole Survivors-like genre before, I assume this is referring to Vampire Survivors? But, that game is 2D, which means if enemies spawn behind you, you can still see them.
For my first few runs of this, I saw a gem in front of me, so I shot it, then I immediately got brought to an upgrade screen, then I died immediately after picking my upgrade. It took me multiple runs to realize that enemies had already spawned behind me & killed me. In fact, the enemies seem to exclusively spawn behind the player?
The visuals really aren't clear either, I had a hard time telling if my shots were hitting the enemies. Some extra visuals & sfx would go a long way!