Thank you for sharing your dream with us. Please take everything that I share to the Holy Spirit as He Alone gives the accurate interpretation.
It appears that there is a spiritual test that you are to encounter or might have encountered and you didn’t do well. It also appears that you need to be involved in spiritual warfare and it’s just you alone in the physical but you have the Holy Spirit helping you. I believe that the dream is teaching you the need to embark on and learn spiritual warfare. There are some warfares in life that you cannot have other humans assist you with, it is part of the pruning process and God developing you to be who He wants you to be, and it usually entails preparation for some future assignment. This will take a lot of work (hence the bicycle) however the Holy Spirit (the man on the bicycle with you and the man with a Gun- gun is the Sword of the Spirit) is always there to help you. Equip yourself with the Armour of God (Ephesians 6:10-18).