8 hours, smoothing and organizing.
Randomized the spawn location of enemies in the intro instead of having fixed patterns.
Smoothed out fast play of the intro phases. Note books are out to consider where lessons are being taught, what should be tutorial, what should be gun 1 set, how to introduce the launcher mechanics, etc.
Reintroduced walker collision now that we know it wasn't the reason they were having pathing problems.
From the tutorial start the health bar and meta data HUD elements are hidden. Health bar reintroduced on passing through the portal and meta data once the player is detected. Traveling through the portal damages the player, on screen text acknowledges this, player can then watch it heal.
The walker texture is finally playing it cool.