Launch parameters

Pass them with --param name=value to gasm-run, or in the player's address (/play/?name=value).

Parameter	Effect
language=N	0 German, 1 English (default), 2 Spanish, 3 Italian, 4 French
unlockall=1	every level counts as unlocked
mode=viewer	fly through a level's geometry instead of playing (with level=N, 1–12)
dump2d=N	debugging: log the visible 2D entities at frame N

In the viewer, the arrow keys move and turn, Q / W strafe, X / Z go up and down and S / A look down and up (on a gamepad: d-pad, shoulder buttons, A / B, X / Y).