I can play Monopoly for gbc using only the esc and tab buttons because it doesn't need the arrow keys (not completely true but, if I accept all the options with the esc key I don't need them) and I don't need to select it in gbc4nspire menu because it is the first of the list.

So, some games of gbc4nspire are compatible with the touchpad  

In gbc4nspire I can't use the arrows too. Will this problems be solved if I downgrade to 2.0?

I deleted the folder, made a new one, downloaded the files and compiled ndless without errors this time 

I tried particles and it worked, but blockdude for os 1.7 not. Is there a new version for ndless 2.0?

Note: My OS is 2.1

There are no binaries on purpose because then people who don't know what they're doing and don't understand the risks of using beta software could screw up their calc. No offense to you, though.

Did you remember to add the ndless directory to your PATH variable?

Yes.

What should I do?

EDIT: Ok, I will see it Shrear

EDIT 2: Can you tell me what is the size of the ndless_installer and ndless_resources, so I see if it's totally compiled?
My ndless_installer is 113KB and ndless_resources 7KB.

I copied the ndless directory to my pendrive and runned msys as admnistrator and it still gives me the error.

It gives me this again:

make[2]: Entering directory '/c/ndless/arm/tests'
nspire-gcc -os -wall -w -c tests.c
tests.c:24:16: fatal error: os.h: No such file or directory

No. I installed the MinGW

EDIT: I installed YAGARTO and now i'm getting this error:

any_key_pressed.c:22:16: fatal error: os.h: No such file or directory
compilation terminated
make[1]: ***[any_key_pressed.o] Error 1