You made it to the secret level. Congratulations! You must be a true Neon Bunker enthusiast.
But don't get too comfortable. The secret level is guarded by the dreaded Bunker Bot-3000, a behemoth of a robot that will stop at nothing to protect the secrets within.
To defeat the Bunker Bot-3000, you'll need to collect three Golden Keys hidden throughout the level. Good luck.
Get your first Golden Key