A ceiling that pins rather than ends

Climbing made a sixteen bit height count down past nought and round to
65535, so a lander that kept going came back through the bottom and hit
the ground FROM ABOVE. Two thousand pixels of climb, which a full tank
reaches easily.

Pinned instead, and told so in the window. Leaving upward is RECOVERABLE -
gravity is always there and a lander with fuel can always come back - so
ending the run would punish a state the player can fly out of. What kills
you out here is running dry a long way from the ground, which is a death
somebody flew into rather than one a boundary handed them.

TWO DIFFERENT LINES, and both were got wrong before they were got right.
The warning covers being AT the ceiling or above it: compared against the
ceiling itself, a pinned lander read as back inside the world the next
frame and the warning was written and wiped sixty times a second, so it
never appeared at all. The pin covers being STRICTLY above it: including
the ceiling dragged the height back every frame and the lander could never
descend, which is a lid nobody can leave and worse than the wrap.

And only the climb is spent, never the fall. Zeroing the speed outright
pinned it there for ever - gravity adds once a tick and a clamp running
every frame wiped the pull nine times out of ten.

The orbit check is gone, and the reason is in video.sh. Every window where
the difference showed turned out to be a few frames wide: hold the
thruster and both landers are pinned with their climbs spent, ease off and
both land and freeze. A version of it passed against one disk and failed
against another, which is a check measuring the boot time rather than the
physics. Orbit is verified by measurement and said to be so, rather than
left looking tested.

cosmosLanderDry wants seventy million cycles now instead of forty: it
spends the whole tank at the ceiling before it falls the length of the
world.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01E2JrLzFvuFX9fgi1LDRjrW

Tests/expected/cosmosSlowDisk.out

@@ -13,7 +13,7 @@ Mode.sbx                48
 Flip.sbx                173
 Sprite.sbx              442
 Depth.sbx               672
-Lander.sbx              2774
+Lander.sbx              2924
 Pad.sbx                 264
 Crash.sbx               632
 vars.script             50