Cannot run

[xianwenchen]

Here is the error:

% sbcl
This is SBCL 2.1.0, an implementation of ANSI Common Lisp.
More information about SBCL is available at <http://www.sbcl.org/>.

SBCL is free software, provided as is, with absolutely no warranty.
It is mostly in the public domain; some portions are provided under
BSD-style licenses.  See the CREDITS and COPYING files in the
distribution for more information.
* (ql:quickload :cl-tetris3d)
To load "cl-tetris3d":
  Load 1 ASDF system:
    cl-tetris3d
; Loading "cl-tetris3d"
..........
(:CL-TETRIS3D)
* (cl-tetris3d:run)

debugger invoked on a TYPE-ERROR in thread
#<THREAD "main thread" RUNNING {1001550103}>:
  The value
    NIL
  is not of type
    SB-SYS:SYSTEM-AREA-POINTER

Type HELP for debugger help, or (SB-EXT:EXIT) to exit from SBCL.

restarts (invokable by number or by possibly-abbreviated name):
  0: [ABORT] Exit debugger, returning to top level.

(LISPBUILDER-SDL-BASE:SURF-W NIL)
   source: (CFFI:FOREIGN-SLOT-VALUE SURFACE
                                    '(:STRUCT
                                      LISPBUILDER-SDL-CFFI::SDL-SURFACE)
                                    'LISPBUILDER-SDL-CFFI::W)
0]

[grouzen]

Hello!

Seems like you should install SDL libraries using a package manager for your OS.
https://wiki.libsdl.org/Installation