/usr/share/games/wing/levels/level1.dat is in wing-data 0.7-27.1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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10 0 10 0 10 0 10 0 10 0 10 0 10 0 10 0 10 0 10 0 10