I have not seen "Vectrex Spike" in Japan yet, but I know vector scan CRTs were often used for 3D video games. Drawing vector graphics on vector scan display was much faster and easier than on raster scan display (normal one) in 80's.
Of course 3DS's LCD is also raster scan display, but I guess SmileBASIC has enough potential for high speed vector graphics. I'm expecting completion of your work.
Neither XON EXKB nor XOFF EXKB are allowed on my SmileBASIC(3.5.1).
In my opinion, it was allowed temporarily because of command syntax matching between SmileBASIC for 3DS and for WiiU.
In any case, USB keyboard isn't available on 3DS.
As far as I know, the only one peripheral input device on 3DS is microphone. Of course 3DS has no USB interface, therefore USB keyboard cannot be available on 3DS. Nor I have never seen EXKB command before.
#4 Land on stern of carrier.
#5 start reverse thrust just before landing.
[procedure to start reverse thrust]
1. Press L button to decrease thrust.
2. After thrust becomes zero, release L button once.
3. Press L button again.
Could you download [9K2N3PJM] and refer to "EX_JUMP2"?
It allows you to go to both directions.
If you give me any questions about it, I'll answer to each of them as clearly as possible. But please don't expect excessively, because my English vocabulary is not enough.
I tried to modify my jump thing you mentioned, however I have not finished yet. Going to both direction is much harder than just one direction. I'll continue retrying it. Could you wait?