Hello,
After half year of not playing Caverns (was a bit burned out about it) played it again and did two small updates:
-No flying sound when player is not active.
-Restart game by pressing joystick button.
Caverns 20191226.bin
Also uploaded a video:
(choose 720P60 for best quality)
And here is the source code and the excel file with level editor, sprite editor, etc. for who is interested:
Caverns source.zip