See the following URL for SDL requirements:-

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


Movement:      Arrow keys
Fire:          Z
Slowdown:      X
Pause/restart: P
Exit:          ESC


Source obtained from here:-

http://aminet.net/package/game/actio/noiz2sa_os4


NB: Due to the large file names in the "boss" directory, this game should
    be played on file systems that can support these large file names, such
    as Fat32 and RAM.


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

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

Archive:  /home/aminet/aminet_root/doc//game/shoot/noiz2sa_68k.zip
 Length   Method    Size  Cmpr    Date    Time   CRC-32   Name
--------  ------  ------- ---- ---------- ----- --------  ----
       0  Stored        0   0% 2012-05-20 02:49 00000000  noiz2sa/
       0  Stored        0   0% 2012-05-20 02:49 00000000  noiz2sa/boss/
     474  Defl:N      263  45% 2003-02-07 04:44 346c48ed  noiz2sa/boss/[Psyvariar]_X-A_boss_opening.xml
     947  Defl:N      355  63% 2002-09-21 21:02 ef37fe93  noiz2sa/boss/[Progear]_round_5_middle_boss_rockets.xml
     719  Defl:N      321  55% 2002-12-29 08:49 06983821  noiz2sa/boss/[Progear]_round_5_boss_last_round_wave.xml
     978  Defl:N      340  65% 2003-02-07 04:43 a2b31feb  noiz2sa/boss/[Progear]_round_3_boss_wave_bullets.xml
     977  Defl:N      389  60% 2002-09-21 21:02 d0ddc258  noiz2sa/boss/[Progear]_round_3_boss_back_burst.xml
     962  Defl:N      370  62% 2002-09-21 21:02 0964960f  noiz2sa/boss/[Progear]_round_2_boss_struggling.xml
     972  Defl:N      376  61% 2002-10-28 11:02 18033287  noiz2sa/boss/[Progear]_round_1_boss_grow_bullets.xml
     724  Defl:N      317  56% 2003-02-09 05:46 fb1d7b5c  noiz2sa/boss/[ketsui]_r5_middle_slow_spread.xml
    2298  Defl:N      498  78% 2003-02-09 14:32 4f6e1feb  noiz2sa/boss/[ketsui]_r5_accel_aim_13way.xml
    1119  Defl:N      365  67% 2003-02-07 07:18 c6722f94  noiz2sa/boss/[ketsui]_r4_boss_rb_rockets.xml
     825  Defl:N      343  58% 2003-02-09 06:06 c352231e  noiz2sa/boss/[ketsui]_r3_boss_fastspread.xml
    1016  Defl:N      361  65% 2002-12-29 09:19 b2909376  noiz2sa/boss/[ketsui]_r2_boss_rkt.xml
    1744  Defl:N      445  75% 2003-02-07 04:42 cb1ac9fc  noiz2sa/boss/[Ikaruga]_r1_mdl.xml
     535  Defl:N      276  48% 2003-02-07 04:42 c4f03181  noiz2sa/boss/[Ikaruga]_drc2.xml
    1158  Defl:N      396  66% 2003-02-07 04:41 9aa52a12  noiz2sa/boss/[Guwange]_round_4_boss_eye_ball.xml
    1708  Defl:N      438  74% 2002-09-21 21:02 c26ca441  noiz2sa/boss/[Guwange]_round_3_boss_fast_3way.xml
     914  Defl:N      384  58% 2002-09-21 21:02 f4a62ad3  noiz2sa/boss/[Guwange]_round_2_boss_circle_fire.xml
    1775  Defl:N      467  74% 2003-08-08 07:16 cb286498  noiz2sa/boss/[daiouzyou]_r1_boss_l.xml
    1020  Defl:N      338  67% 2002-09-21 21:02 cc846ca8  noiz2sa/boss/[daiouzyou]_r1_boss_5.xml
    1580  Defl:N      423  73% 2002-09-21 21:02 ff44e49f  noiz2sa/boss/[daiouzyou]_r1_boss_4.xml
    1124  Defl:N      403  64% 2003-02-07 04:40 af492ab1  noiz2sa/boss/[daiouzyou]_r1_boss_1.xml
    2503  Defl:N      471  81% 2003-02-07 04:41 7d68f6de  noiz2sa/boss/[daiouzyou]_hibati_2_2_r.xml
    1726  Defl:N      450  74% 2003-02-07 04:47 eae713f9  noiz2sa/boss/[daiouzyou]_hibati_2_2_b.xml
    1024  Defl:N      367  64% 2003-02-07 04:46 cc997e98  noiz2sa/boss/side_cracker.xml
     939  Defl:N      365  61% 2002-09-29 18:21 fc14126e  noiz2sa/boss/rollbar.xml
    1453  Defl:N      426  71% 2003-08-08 07:20 1b1dd748  noiz2sa/boss/roll3pos.xml
     818  Defl:N      350  57% 2003-02-09 04:59 81bd348f  noiz2sa/boss/forward_3way.xml
    1516  Defl:N      450  70% 2003-02-08 14:52 d5edbefc  noiz2sa/boss/double_roll_seeds.xml
    1304  Defl:N      416  68% 2003-02-07 04:44 27bf6169  noiz2sa/boss/bit.xml
    1023  Defl:N      353  66% 2003-02-07 04:44 4fc3ef69  noiz2sa/boss/beewinder.xml
     817  Defl:N      339  59% 2003-02-07 04:44 39156b6f  noiz2sa/boss/88way.xml
    1164  Defl:N      355  70% 2003-02-07 04:44 db17ed9a  noiz2sa/boss/57way.xml
       0  Stored        0   0% 2012-05-20 03:09 00000000  noiz2sa/docs/
     781  Defl:N      472  40% 2012-05-20 03:09 b509dc9f  noiz2sa/docs/noiz2sa_68k.readme
     487  Defl:N      229  53% 2012-05-19 08:36 a2fcb5a0  noiz2sa/docs/noiz2sa_68k.readme.info
    4378  Defl:N     2284  48% 2003-08-11 14:25 27e08e87  noiz2sa/docs/readme.txt
     468  Defl:N      210  55% 2012-05-19 08:36 b1fdf011  noiz2sa/docs/readme.txt.info
    4366  Defl:N     2043  53% 2003-08-07 18:27 cfd4b0a2  noiz2sa/docs/readme_e.txt
     487  Defl:N      231  53% 2012-05-19 08:36 1646679e  noiz2sa/docs/readme_e.txt.info
    1452  Defl:N     1072  26% 2011-11-09 23:03 31bd19b5  noiz2sa/IconX
       0  Stored        0   0% 2012-05-20 02:49 00000000  noiz2sa/images/
     920  Defl:N      274  70% 2002-10-31 11:49 b0c15e36  noiz2sa/images/title_2.bmp
     920  Defl:N      334  64% 2002-10-31 11:50 4b27f52d  noiz2sa/images/title_a.bmp
     884  Defl:N      105  88% 2002-10-31 11:48 8c29a537  noiz2sa/images/title_i.bmp
     916  Defl:N      214  77% 2002-10-31 11:37 3144ad86  noiz2sa/images/title_n.bmp
     920  Defl:N      288  69% 2002-10-31 11:47 4f7693c9  noiz2sa/images/title_o.bmp
     920  Defl:N      324  65% 2002-10-31 11:50 6203cbbe  noiz2sa/images/title_s.bmp
     900  Defl:N      201  78% 2002-10-31 11:48 b8c0277d  noiz2sa/images/title_z.bmp
       0  Stored        0   0% 2012-05-20 02:49 00000000  noiz2sa/middle/
    1226  Defl:N      402  67% 2003-02-06 10:36 731b9153  noiz2sa/middle/1tonway.xml
    1386  Defl:N      432  69% 2003-02-06 10:36 763fce9c  noiz2sa/middle/22way.xml
    1651  Defl:N      472  71% 2003-02-06 10:36 383a48eb  noiz2sa/middle/23accel.xml
    1298  Defl:N      415  68% 2003-02-06 10:36 bd021db4  noiz2sa/middle/2round.xml
    2010  Defl:N      422  79% 2003-02-06 10:37 4ef41176  noiz2sa/middle/4waccel.xml
     893  Defl:N      364  59% 2003-02-06 10:37 232528dc  noiz2sa/middle/4way.xml
     998  Defl:N      393  61% 2003-02-06 10:38 54487d41  noiz2sa/middle/accel16way.xml
     700  Defl:N      322  54% 2003-02-06 10:38 610eb2a3  noiz2sa/middle/grow.xml
    1425  Defl:N      425  70% 2003-02-06 10:38 df19f8f2  noiz2sa/middle/growround.xml
    1288  Defl:N      413  68% 2003-02-06 10:38 48e62956  noiz2sa/middle/mnway.xml
    1048  Defl:N      391  63% 2003-02-06 10:38 98cbd6b9  noiz2sa/middle/nwroll.xml
     780  Defl:N      327  58% 2003-02-06 10:38 113c012e  noiz2sa/middle/shotgun.xml
    1057  Defl:N      386  64% 2003-02-06 10:39 b01dbed9  noiz2sa/middle/spread2blt.xml
    1142  Defl:N      370  68% 2003-02-06 10:40 516dcda1  noiz2sa/middle/spreadnn.xml
    1157  Defl:N      400  65% 2003-02-06 10:39 a481ae5d  noiz2sa/middle/spread_bf.xml
    1055  Defl:N      380  64% 2003-02-06 10:40 a8cba67d  noiz2sa/middle/vrtlas.xml
    1112  Defl:N      370  67% 2003-02-06 10:40 0550c740  noiz2sa/middle/xfire.xml
    1072  Defl:N      362  66% 2002-10-29 22:35 22c5849a  noiz2sa/middle/[daiouzyou]_r1_boss_2.xml
    1253  Defl:N      425  66% 2003-02-06 10:35 d26ec6ff  noiz2sa/middle/[daiouzyou]_r1_boss_3.xml
     709  Defl:N      317  55% 2003-02-06 10:36 f5efeccd  noiz2sa/middle/[Ikaruga]_r3_mdl_3.xml
     865  Defl:N      348  60% 2003-02-06 10:36 db38ae21  noiz2sa/middle/[Ikaruga]_rf_l.xml
    2017  Defl:N      511  75% 2003-02-06 13:06 f6617f6b  noiz2sa/middle/[ketsui]_r2_5way_round.xml
    1120  Defl:N      407  64% 2003-02-06 13:37 ff480cfd  noiz2sa/middle/[ketsui]_r4_boss_last_red_aim.xml
      64  Defl:N       63   2% 2012-05-17 19:29 32e70953  noiz2sa/noiz2sa
  332344  Defl:N   329011   1% 2012-05-17 19:07 edd7e428  noiz2sa/noiz2sa.fpu
     460  Defl:N      230  50% 2012-05-19 08:36 df7477bf  noiz2sa/noiz2sa.info
     707  Defl:N       43  94% 2012-05-20 02:50 40ebc7e0  noiz2sa/noiz2sa.prf
       0  Stored        0   0% 2012-05-20 02:49 00000000  noiz2sa/sounds/
   29868  Defl:N    28547   4% 2005-09-21 00:12 4f272c8d  noiz2sa/sounds/bonus.wav
  121644  Defl:N   119143   2% 2005-09-21 00:13 1e20c516  noiz2sa/sounds/bossdst.wav
  141164  Defl:N   131016   7% 2005-09-21 00:13 58bfafc5  noiz2sa/sounds/extend.wav
   28288  Defl:N    27121   4% 2002-10-31 01:02 83f574c0  noiz2sa/sounds/foedst.wav
   11242  Defl:N    10594   6% 2005-09-21 00:14 b1823a03  noiz2sa/sounds/hit.wav
   87698  Defl:N    86335   2% 2005-09-21 00:14 40824850  noiz2sa/sounds/shipdst.wav
   19468  Defl:N    17756   9% 2005-09-21 00:15 298fb65c  noiz2sa/sounds/shot.wav
  121735  Defl:N   121775   0% 2012-05-17 19:16 45fc6796  noiz2sa/src.7z
       0  Stored        0   0% 2012-05-20 02:49 00000000  noiz2sa/zako/
    1351  Defl:N      421  69% 2003-02-06 10:41 5f9be923  noiz2sa/zako/248shot.xml
     901  Defl:N      363  60% 2003-02-06 10:41 76ef0efb  noiz2sa/zako/3waychase.xml
    1933  Defl:N      463  76% 2003-02-06 10:41 f5919ef9  noiz2sa/zako/6gt.xml
    1003  Defl:N      352  65% 2003-02-06 10:41 b09133b7  noiz2sa/zako/accel.xml
     908  Defl:N      372  59% 2003-02-06 10:42 9ab27278  noiz2sa/zako/accum.xml
     959  Defl:N      382  60% 2003-02-06 10:42 12989a88  noiz2sa/zako/bar.xml
     814  Defl:N      350  57% 2003-02-06 10:42 300721b6  noiz2sa/zako/bee.xml
     803  Defl:N      325  60% 2003-02-06 10:42 0445d9eb  noiz2sa/zako/bit_move.xml
    1202  Defl:N      363  70% 2003-02-06 10:42 92a7068f  noiz2sa/zako/nway.xml
     999  Defl:N      383  62% 2003-02-06 10:42 27de441d  noiz2sa/zako/rndway.xml
    1527  Defl:N      428  72% 2003-02-06 10:43 01e3aee6  noiz2sa/zako/slowdown.xml
     975  Defl:N      330  66% 2003-02-06 10:43 e72dd465  noiz2sa/zako/spread.xml
     691  Defl:N      308  55% 2003-02-06 10:43 2c445510  noiz2sa/zako/stay.xml
     579  Defl:N      292  50% 2003-02-06 10:43 dc4dae85  noiz2sa/zako/thrust.xml
    1291  Defl:N      419  68% 2003-02-06 10:43 f07cddcf  noiz2sa/zako/twin.xml
    1126  Defl:N      387  66% 2003-02-06 10:43 c03f90ab  noiz2sa/zako/twin_extend.xml
     683  Defl:N      326  52% 2003-02-06 10:40 f1078e44  noiz2sa/zako/[Ikaruga]_r5_vrp.xml
     786  Defl:N      339  57% 2003-02-08 12:24 31c6281f  noiz2sa/zako/[ketsui]_r1_boss_bit.xml
    2802  Defl:N     1843  34% 2012-05-19 08:36 2fc8682a  noiz2sa/docs.info
    2802  Defl:N     1840  34% 2012-05-19 08:36 67aa72fa  noiz2sa.info
--------          -------  ---                            -------
 1002734           911465   9%                            108 files