Rooms are numbered on the vertical axis and assigned letters on the horizontal, where the starting room is B1. There are hints for each puzzle that range from extremely vague to very specific, with the specificity increasing with each hint. Reveal as many as you need to get yourself unstuck. The very last hint in most cases is a video walkthrough.
Start by choosing a room.
Room B1 "Einstein"
Room A1 "Wormhole"
Room A2 "Transit"
Room A3 "Reversal"
Room B3 (1) "Freedom"
Room B3 (2) "Backtrack"
Room A4 (1) "Western Way-Station"
Room A4 (2) "Multiverse"
Room A5 (1) "Shotgun"
Room A5 (2) "White Hole"
Room A6 "Western Checkpoint"
Room B6 "Central Checkpoint"
Room B2 "Barriers"
Room C3 (1) "Crash"
Room C3 (2) "Eastern Way-Station"
Room C1 "Factory"
Room C2 "Recycler"
Room C4 "Tracer"
Room C5 "Jailbreak"
Room B4 "Tunnel"
Room B5 "Firewall"
Room C7 "Labyrinth"
Finally, here's a complete walkthrough of the game.