Caveflyer , no shooting just flying and you fly 
with spacebar and nothing else.

Based on the Dreamcast port.

Screenshots and source:

http://www.dcemu.co.uk/sfcave.php

have phun

 PERMSSN    UID  GID    PACKED    SIZE  RATIO     CRC       STAMP          NAME
---------- ----------- ------- ------- ------ ---------- ------------ -------------
[generic]                11850   12483  94.9% -lh5- 71d1 Dec  4 08:38 YasfCave_OS4.info
[generic]                 5965   15425  38.7% -lh5- 572b May 14  2002 YasfCave_OS4/COPYING.txt
[generic]                12046   12068  99.8% -lh5- 08a6 May 14  2002 YasfCave_OS4/fontblue.png
[generic]                12029   12048  99.8% -lh5- 9e7f May 14  2002 YasfCave_OS4/fontred.png
[generic]                    4       4 100.0% -lh0- ef42 Dec  4 08:37 YasfCave_OS4/highscore.dat
[generic]                  993    1875  53.0% -lh5- a97b Jan 30  2005 YasfCave_OS4/README.txt
[generic]                 1977    2422  81.6% -lh5- c52c Dec  4 08:38 YasfCave_OS4/README.txt.info
[generic]               330050  658680  50.1% -lh5- 3523 Dec  4 08:22 YasfCave_OS4/YASF_OS4.exe
[generic]                11676   12464  93.7% -lh5- fc16 Dec  4 08:38 YasfCave_OS4/YASF_OS4.exe.info
---------- ----------- ------- ------- ------ ---------- ------------ -------------
 Total         9 files  386590  727469  53.1%            Dec  4 15:54