sure basic can make good games the guitar hero aren't bad. my problem is that you have to press keys that are distributed on the calc and not in a line.

The issue with the 83 is that it doesn't have archive memory, thus, no appvars and no application (less space for other stuff too, altough it has 2 more KB of RAM)

Thats why I asked to make it without sound

Since almost no one use the old 83 anymore (without the +) Idk if it would be worth it to convert the game to this model.

unfortunately in germany we use the old ti 83 or 82 stats (other name same thing)

I don't believe the 83 has application variables? (http://tibasicdev.wikidot.com/file-extensions) In that case I would probably have to store my application variables as programs or something?
How is the memory on the 83 organised? Does it have any ROM? Does it use paging? How so?
How do bcalls work?

No it hasn't appvars maybe you could store it as lists or normal vars.
cause I only programm in basic i don't know these things but i has only 27 kb ram availbe for the user
it has Roms 1.02, 1.03, 1.04, 1.06, 1.07, 1.08, 1.10