From 26th of February 2021, it's available on Steam for $1.99 or the regional equivalent.
During the first week it's also on 15% discount!
Supported platforms are Windows, Linux and MacOS.
Hack Grid is a hacking-themed puzzler and love letter to DOS gaming.
It even simulates the sound of the classic old-school Sound Blaster 16.
Each piece is unique, and has its own set of rules; some move, some change color, some absorb other pieces, and others can become obstacles and get in your way.
The goal of each level is to clear the board until only one piece remains.
Steam Store Page: https://store.steampowered.com/app/1543290/Hack_Grid/