Sorry for the delay folks. Swap Blocks is now available for purchase. The soundtrack will be getting a separate release next week so if you like the music be on the lookout for that :)
http://store.steampowered.com/app/672030/Swap_Blocks/
Swap Blocks is now released
Build and release context
Recorded Steam release date:
Within one calendar day of this post (UTC). The listed date does not establish an exact launch time.