I just wanted to try something out tonight and wrote a small demo program for the MEGA65 in BASIC.
There was once "some computer", which had as a better known demo a rotating ball. So I thought, for the MEGA65 one ball is maybe a little bit less.
I programmed the demo with BASIC 65.EX, which I also wanted to test the ROM for errors.
But since I didn't use any specific features from this ROM and it is based on the 920300 ROM, the demo program also works on the "official" ROM. However, a calculation(?) problem has probably crept in here in the newer versions: The filled grids of the balls are "shifted" a bit and drawn with some more visible black gaps (see the two screenshots). But the demo program still works!
With BASIC 65.EX:
With ROM 920346:
Attached are two short video clips of the program (if you just want to have a look) and the program as a packed D81 image (if you want to try it out).
Demo with BASIC 65.EX: mega65_ball_demo_basic65_ex.mp4
Demo with 920346: mega65_ball_demo_920346.mp4
I was "very sparing" with REM comments (today I rather wanted to test), but hopefully I made the listing reasonably clear.