Purchased a game and my graphics do not support

I purchased a game called Mystery Case Files: Escape from Ravenhearst. when trying to load game a box pops up that says my graphics do not support this game. The system requirements for the game are:

Operating System: XP/Vista/Windows 7/Windows 8
CPU: 1.8 GHz
RAM: 1 GB (1024 MB)
Display Memory (graphics device): 128MB
DirectX Version: 9.2
Hard Drive: 1510 MB of free space

My system is:
Microsoft Windows XP Professional
Version 2002
Service Pack 3

Computer:
Intel(R)Pentium(R) 4 CPU 2.80GHz
2.79GHz, 2.99 GB of RAM

When i go to DirectX Diagnostic Tools under the display tab it says:
Device Name: Intel(R) 82915G/GV/910GL Express Chipset Family
Manufacturer: Intel Corporation
Chip Type: Intel(R) 82915G/GV/910GL Express Chipset
DAC Type: Internal
Approx. Total Memory: 128.0 MB
Current Display Mode: 1152 x 864 (32 bit) (75Hz)
Monitor: Plug and Play Monitor

When I did the test on the DirectDraw Acceleration everything was fine. I did the test on the Direct3D Acceleration 2x's. The first test showed that Direct3D 7 was fine and Direct3D 8 was fine but no Direct3D 9. The second test showed Direct3D 7 but no Direct3D 8 or 9.

I don't know how to fix or upgrade my graphics card. HELP!!!!!!