You are in a labyrinth, finding the exit. You'll find portals where they take you to different worlds.

Use the arrow keys to move around. You might need to use UP to JUMP later on.

Some hints (shorter version!):
1) Each world has a gold key & a white key.
2) Find the worlds' gold key to access portals.
3) Find the worlds' white key to open a new portal near it.
4) Portals share the same coordinates across each world.
5) Portals warp you in this order: world1, world2, world3, world1, etc.
6) Try re-entering portals.
7) The worlds have the same sized map.

Paraphrased hints:
1) Every world (three in total) has one of each key: a gold key and a white key.
2) Gold keys are needed to have the portal take you to a different world. The number indicates the world that the key belongs to. Find the gold key in the same world you are in to access portals.
3) White keys will create a new portal in the same world with that key. The number indicates the world that the key belongs to. So when you get a white key in one world, try to find the portal that just appeared in that world.
4) Generally, a portal will appear at the same spot across every world. However, a portal may only be in one world, but entering it will bring the portal with you to the next world.
5) A portal will take you to each world sequentially. So, starting in world 1, all portals take you to world 2, then all portals take you to world 3, and all portals in world 3 takes you back to world 1. Therefore, the rotation goes like this: world1...world2...world3...world1...world2...
6) Try entering the same portal more than once. You might find something!
7) The map dimensions for each world are the same and every rooms are used in each map. So if you know the dimensions, use that as a hint to explore each and every rooms.

Good luck finding the exit!