Where Next
So you now have a working Neo6502. Here are some places to explore.
Discord
There is an active discord where you can ask questions or whatever of the people involved in software and hardware, and ask for assistance.
There is a link to join it here
Languages available
C and Pascal development are currently working well (both LLVM and CC65) as well as Assembler and BASIC. Forth and a variant are currently under development. There is an early version of LLVM documentation and a more complete Pascal example on the wiki page.
Other software
Other software is available, linked from the Wiki, now including a Tile map and Sprite editor, and a file manager, and some games.
There is a facebook group here
Assembler, BASIC , C and Pascal examples
Under "examples" are a variety of sample programs some of which are full programs, some demonstrate specific features of BASIC or the API. The .bsc files are text versions of the BASIC files.
The Youtube series
There is a 7 part youtube video series of about 30 minutes which walks through programming a simple game in BASIC using cross development and external tools. Much of it is applicable to C and Pascal which uses the same API - many BASIC commands are simple wrappers round the API functions.