It is heavily work in progress and many features and gameplay mechanics are missing in this initial release. I will add them again gradually. Read the new posts
For now you need to type PLAY and the Level name you want to access, like PLAY LEVEL 0 PART 3. I will add transitions later one by one, first from the Forest Scene into the first part of Level 0 and so on. They will all be connected with gameplay that currently is not made, so it needs time to finish. The release, for steam that is, is set for the 25th December and the game will be patched after that as well.
Also the game is free, so no obligation to play and feel betrayed.