Godot, Unity, what-have-you! Take a stab at using the tools that have given you countless worlds to explore throughout your lives! The first world you create may not look the same. It may not talk. It may not see. it may have glitches... and won't export correctly... so real... like, every time. But it's your world run by your rules and we will enjoy it! Good try!
Another quality of this Jam is that it's focus is easter-eggs. Whatever form your game takes, give us all a nice little secret/surprise to look out for. It's 4am when I'm writing this! We all love us some easter eggz!
April 1st is the Dead...........line.