See the following URL for SDL requirements:-

http://aminet.net/package/dev/misc/SDL-Amiga


"Gem Drop X" is an interesting one-player puzzle game using the
Simple DirectMedia Layer (SDL) libraries.

It is a direct port of "Gem Drop," an Atari 8-bit game written in Action!
(a very fast C- and Pascal-like compiled language for the Atari).

It was originally ported to X11, using SDL for sound and music.
Eventually, the Xlib graphics calls were removed and replaced with
SDL calls.

The concept of the game "Gem Drop" is based on an arcade game for the
NeoGeo system called "Magical Drop III" by SNK.

If you're familiar with games like Jewels, Klax, Bust-A-Move or Tetris,
this game is similar to them all.  I consider it closest to Klax.
Some people have compared it to "Tetris meets Space Invaders."


Feeling bored ?  :)
Why not check out this URL ?

http://home.iprimus.com.au/lombi/1/homepage.htm

 PERMSSN    UID  GID    PACKED    SIZE  RATIO METHOD CRC     STAMP          NAME
---------- ----------- ------- ------- ------ ---------- ------------ -------------
[unknown]                 1840    2802  65.7% -lh5- d81b Nov 24 15:13 gemdropx.info
[unknown]                    3       3 100.0% -lh0- c8c5 Nov 24 15:25 gemdropx/.gemdropx
[unknown]                 1841    2802  65.7% -lh5- 29ad Nov 24 15:14 gemdropx/docs.info
[unknown]                  799    1472  54.3% -lh5- 2250 Nov  1  1999 gemdropx/docs/AUTHORS.txt
[unknown]                  241     487  49.5% -lh5- fb0f Nov 24 15:14 gemdropx/docs/AUTHORS.txt.info
[unknown]                 1400    2818  49.7% -lh5- e63b Feb 12  2002 gemdropx/docs/CHANGES.txt
[unknown]                  240     487  49.3% -lh5- 0863 Nov 24 15:14 gemdropx/docs/CHANGES.txt.info
[unknown]                 7009   18007  38.9% -lh5- fa00 Dec 28  1999 gemdropx/docs/COPYING.txt
[unknown]                  241     487  49.5% -lh5- ddc2 Nov 24 15:14 gemdropx/docs/COPYING.txt.info
[unknown]                  677    1130  59.9% -lh5- 6ad8 Nov 24 15:09 gemdropx/docs/gemdropx-68k.readme
[unknown]                  239     487  49.1% -lh5- 2eae Nov 24 15:14 gemdropx/docs/gemdropx-68k.readme.info
[unknown]                 3463    8086  42.8% -lh5- d841 May 18  2002 gemdropx/docs/README.txt
[unknown]                  241     487  49.5% -lh5- 81b7 Nov 24 15:14 gemdropx/docs/README.txt.info
[unknown]                   73      75  97.3% -lh5- 725c Nov 24 15:02 gemdropx/gemdropx
[unknown]               205820  205820 100.0% -lh0- e9cc Nov 24 14:52 gemdropx/gemdropx.fpu
[unknown]                  226     460  49.1% -lh5- 7cb7 Nov 24 15:13 gemdropx/gemdropx.info
[unknown]                 1067    1452  73.5% -lh5- 5096 Nov 12 23:40 gemdropx/IconX
[unknown]                  290    1348  21.5% -lh5- d08f May 18  2002 gemdropx/images/.xvpics/credits.bmp
[unknown]                 2466    3354  73.5% -lh5- 157b Dec 28  1999 gemdropx/images/author.bmp
[unknown]                 2038    3098  65.8% -lh5- f930 Dec 28  1999 gemdropx/images/block.bmp
[unknown]                 2200    3098  71.0% -lh5- 834e Dec 28  1999 gemdropx/images/bluegem.bmp
[unknown]                 1817    3098  58.7% -lh5- b4ba Dec 28  1999 gemdropx/images/bomb.bmp
[unknown]                 3098    3098 100.0% -lh0- 0074 Dec 28  1999 gemdropx/images/brick.bmp
[unknown]                 4539   13082  34.7% -lh5- ecca Dec 28  1999 gemdropx/images/congratulations.bmp
[unknown]                 1938   61494   3.2% -lh5- 0ad5 May 18  2002 gemdropx/images/credits.bmp
[unknown]                 1782    3098  57.5% -lh5- a95d Dec 28  1999 gemdropx/images/diamond.bmp
[unknown]                 2297    3098  74.1% -lh5- cab3 Dec 28  1999 gemdropx/images/disc.bmp
[unknown]                  382    3098  12.3% -lh5- 7417 Dec 28  1999 gemdropx/images/dot.bmp
[unknown]                 1795    3098  57.9% -lh5- c74c Dec 28  1999 gemdropx/images/explode0.bmp
[unknown]                 2264    3098  73.1% -lh5- d0a3 Dec 28  1999 gemdropx/images/explode1.bmp
[unknown]                 2081    3098  67.2% -lh5- 9ee3 Dec 28  1999 gemdropx/images/explode2.bmp
[unknown]                 2017    3098  65.1% -lh5- 29a4 Dec 28  1999 gemdropx/images/explode3.bmp
[unknown]                 1740    3098  56.2% -lh5- 3164 Dec 28  1999 gemdropx/images/fuji.bmp
[unknown]                 2050    3098  66.2% -lh5- ec18 Dec 28  1999 gemdropx/images/happy.bmp
[unknown]                  222     458  48.5% -lh5- ebc5 Dec 28  1999 gemdropx/images/level.bmp
[unknown]                  214     458  46.7% -lh5- 5035 Dec 28  1999 gemdropx/images/lines.bmp
[unknown]                  227     458  49.6% -lh5- 7d76 Dec 28  1999 gemdropx/images/need.bmp
[unknown]                  482    1354  35.6% -lh5- 9aae Dec 28  1999 gemdropx/images/numbers.bmp
[unknown]                  311     842  36.9% -lh5- bf41 Dec 28  1999 gemdropx/images/patience.bmp
[unknown]                  232     458  50.7% -lh5- 4aea Dec 28  1999 gemdropx/images/paused.bmp
[unknown]                  167     255  65.5% -lh5- 5a56 Apr  4  1999 gemdropx/images/readme
[unknown]                 2101    3098  67.8% -lh5- ed4d Dec 28  1999 gemdropx/images/sad.bmp
[unknown]                  233     458  50.9% -lh5- ffec Dec 28  1999 gemdropx/images/score.bmp
[unknown]                 2013    3098  65.0% -lh5- 25c2 Dec 28  1999 gemdropx/images/stopwatch.bmp
[unknown]                 7680   30794  24.9% -lh5- bd2e Dec 28  1999 gemdropx/images/title.bmp
[unknown]                 1935    3098  62.5% -lh5- ab83 Dec 28  1999 gemdropx/images/triangle.bmp
[unknown]                  194     458  42.4% -lh5- 1d55 Dec 28  1999 gemdropx/images/uhoh.bmp
[unknown]                  312    3098  10.1% -lh5- b1f4 Dec 28  1999 gemdropx/images/warning.bmp
[unknown]                 2111    3098  68.1% -lh5- 4573 Dec 28  1999 gemdropx/images/warning1.bmp
[unknown]                 2211    3098  71.4% -lh5- 6c75 Dec 28  1999 gemdropx/images/warning2.bmp
[unknown]                 2124    3098  68.6% -lh5- 964f Dec 28  1999 gemdropx/images/warning3.bmp
[unknown]                 2251    3098  72.7% -lh5- 7710 Dec 28  1999 gemdropx/images/warning4.bmp
[unknown]                 2453    3098  79.2% -lh5- 0ae7 Dec 28  1999 gemdropx/images/wildcard.bmp
[unknown]                 2054    3098  66.3% -lh5- 81f0 Dec 28  1999 gemdropx/images/win1.bmp
[unknown]                 2055    3098  66.3% -lh5- e7a9 Dec 28  1999 gemdropx/images/win2.bmp
[unknown]                 2011    3098  64.9% -lh5- 10ab Dec 28  1999 gemdropx/images/yellowgem.bmp
[unknown]               203059  329460  61.6% -lh5- 4ce2 Apr  4  1999 gemdropx/sounds/22drops.mod
[unknown]                92337  207732  44.5% -lh5- 8efc Apr  4  1999 gemdropx/sounds/2force.xm
[unknown]                54272   79660  68.1% -lh5- 776b Apr  4  1999 gemdropx/sounds/applause.wav
[unknown]                 5291    8350  63.4% -lh5- 2fb6 Apr  4  1999 gemdropx/sounds/begin.wav
[unknown]                26313   47424  55.5% -lh5- ea44 Apr  4  1999 gemdropx/sounds/bomb.wav
[unknown]                 2351    7816  30.1% -lh5- 7065 Apr  4  1999 gemdropx/sounds/buzzer.wav
[unknown]               198220  301146  65.8% -lh5- ae4f Apr  4  1999 gemdropx/sounds/citron.mod
[unknown]                 6741    9278  72.7% -lh5- 353a Apr  4  1999 gemdropx/sounds/clock.wav
[unknown]                16032   27016  59.3% -lh5- c57a Apr  4  1999 gemdropx/sounds/gameover.wav
[unknown]                10857   11544  94.0% -lh5- fa23 Apr  4  1999 gemdropx/sounds/got.wav
[unknown]                  600    1604  37.4% -lh5- 1663 Apr  4  1999 gemdropx/sounds/grab.wav
[unknown]               138339  255881  54.1% -lh5- 1913 Apr  4  1999 gemdropx/sounds/hr_suds.xm
[unknown]                  824    3764  21.9% -lh5- a242 Apr  4  1999 gemdropx/sounds/levelselect.wav
[unknown]                  148     225  65.8% -lh5- c659 Apr  4  1999 gemdropx/sounds/readme
[unknown]                 3096    5354  57.8% -lh5- 5954 Apr  4  1999 gemdropx/sounds/throw.wav
[unknown]                 4874    7840  62.2% -lh5- 3987 Apr  4  1999 gemdropx/sounds/wildcard.wav
[unknown]                 8278   15934  52.0% -lh5- 573a Apr  4  1999 gemdropx/sounds/win.wav
[unknown]                24936   24936 100.0% -lh0- 682f Nov 24 14:55 gemdropx/src.7z
---------- ----------- ------- ------- ------ ---------- ------------ -------------
 Total        74 files 1090375 1785047  61.1%            Nov 23 22:29