These 3 years, I was solo developing the game alone. Throughout these 3 years, I re-connect with my friends, they help me look through the game I'm working on. They help me understand what I'm lacking and what can be improve. Throughout the year, I slowly learn a lot of game design and using unreal blueprint to create the game.
Initially, I thought I can't implement changing gravity direction mechanic and re-construct the whole game 3 time. Until I found a plug-in that can help me implement the mechanic I want and with the help of a part time programmer, I manage to achieve something I want.

The game is still far from finish, but me and my part time programmer has finish implement the core mechanic for the game. Now it is time for production stage. We are going to implement content for the game and polish as much as possible for a public demo.