Dead Hotel, by Comazombie.
Windows executable (Intel 32-bit) and link to walkthrough video.
(As originally submitted to the competition.)

 NameMtimeSizeType
0 Index 2025-03-25 11:17:49Z 140 B text/plain
1 deadhotel.exe 2011-09-29 14:00:10Z 160 KiB application/octet-stream
2 deadwalk.txt 2011-10-01 15:44:29Z 88 B text/plain; charset=utf-8