Artech Studios’ floaty casual PC and XLBA thing now has a demo.
Get it here. It’s described on Steam thus:
“The UnderGarden is a casual Zen game that challenges players to explore beautiful underground caverns filled with strange life forms, sound, music and plenty of hidden secrets. Casual gamers with an affinity towards puzzle games will enjoy The UnderGarden’s modern exploration quest filled with brain teasing games that combine state of the art 3D rendering and physics based puzzles.”
It’s free. Do it. The demo’s time-limited to 30 minutes and the whole game will cost you €10.