News taken from GBAemu.com:

You may kinda recognise 2BitsBallWall as its predecessor 1BitsBallWall was entered originally in last years 4K GBA compo by JustBurn. This version released today was made in July 2002 but he forgot to release it 🙂 It now features 60 levels, password support and 4 colors per tile instead of 2 colors 🙂

You can get the download from GBAemu.

http://www.gbaemu.com/