Game is nearing the completition, I still need to do couple more cutscenes, final boss, end credits, time trial mode and some final polish, then I can start looking into releasing the game. Hopefully I have the game finished during this month.
At the end of the final dungeon, you encounter enormous door. You need to gather crystals from 4 hidden levels spread around the dungeon to open the door and reach the end of the game. Near the door you will also find murals that hint where the entrances to the secret levels are located at.