The OST is now available to stream on Google Play! Check it out here. As with the Steam and Bandcamp versions, I'll be continually adding new songs as new content for Tower is released.
If you have the Steam/Bandcamp versions already as well as a Google Play Music subscription, you can support me even further by streaming it instead (I get paid per-play instead of through sales, WOAH)
Sidenote: for those wondering about a Spotify or Apple Music release, it looks like it won't be possible (for the time being, at least) since you need a distributor/label to get anything on them.
Thanks and happy listening!