So, I approached them on Discord, asked for Mac and Linux builds to be released on GOG.com, they shared a Mac DRM-Free build to download and said they will be updating Sparklite on gog with the counterparts "at some point". Really hope they do it so everyone will be able to enjoy the game without depending on Wine.

EDIT:
Hey, it seems that won't happen. So go ask for drm-free builds of Mac or Linux to the devs on Discord, they will send you a link. Amazing devs!