The demo can be accessed on the right side of the page using the "Download Demo" button.
The first, earliest version of the demo is finally out and is ready to be tested! I will be working on this demo for this October's Next Fest (Oct. 14 - 21).
If you are very excited about the game and would like to test stuff out (that might have a little jank or confusion), please give the demo a shot and leave me feedback in the discussions page under the "Demo Feedback" subforum:
https://steamcommunity.com/app/2635950/discussions/1/