Dreams involving caves often symbolize the subconscious mind, exploring hidden fears or emotions. The ability to fly suggests a sense of freedom or escape from these fears. The presence of disturbing enemies, especially those taking the form of spiders or shapeless entities, may represent anxieties or unresolved issues in your life. These creatures transforming into even worse forms could indicate feelings of being overwhelmed or that your problems seem to multiply the more you confront them.
The fact that you ended up alone contemplating the horrible world around you suggests a feeling of isolation or helplessness in facing these fears. This dream may be urging you to confront the issues that are causing you distress, rather than allowing them to multiply unchecked.
Consider reflecting on any current challenges in your life that feel insurmountable. It may be beneficial to talk to someone about your feelings or to find healthy outlets for expressing and addressing your fears. Remember, facing your fears can often lead to personal growth and a clearer perspective on your situation.