hello, the difference is pointed out in the devlog of the free and full release, and about the sounds, ive no problems in that in my end, maybe its your device? thank you for playing
Nope, I can only hear sound from 1 speaker (right channel). Tested this on my MacBook (internal & external speakers) and Analogue Pocket (both portable & docked). All other GBC games give sound on stereo channels.