Request Add avatar with jam combo and able to choose Background gameplay

[YukiSakuma]

I've downloaded the latest file uploaded in the O2jam Interface Group and I really like it especially you can set custom speed (e.g. 3.25) w/o experiencing the normal note bug
Just like what the title says I really would appeciate if those two features are added since I see it as an alternative for O2China if developed right
Also note guidelines is appreciated and there's that weird judgement timing it feels like I am playing O2Mania even when Vsync OFF and full screen (800x600)
Another thing the application hangs that I have to close and restart it when trying to play some songs (e.g. Unit.B (Ladymade Corestar remix), Last Remote type B, Silver Wind, etc)
WhatIsHang says
Remarks:

• The program probably hangs because there is an infinite loop, very long loop, or recursive calls.

Strings found in the stack:
RAVAUh

Modules found in the stack:
nvoglv64.DLL , NVIDIA Corporation , NVIDIA Compatible OpenGL ICD, NVIDIA Compatible OpenGL ICD
jvm.dll , Oracle Corporation , Java(TM) Platform SE 8u73, Java HotSpot(TM) 64-Bit Server VM
KERNELBASE.dll , Microsoft Corporation , Microsoft® Windows® Operating System, Windows NT BASE API Client DLL
msvcr100.dll , Microsoft Corporation , Microsoft® Visual Studio® 2010, Microsoft® C Runtime Library