Indie Buskers member Rat King Entertainment has released a playable pre-alpha version of its first-person puzzle-platformer TRI.

In TRI, players build makeshift platforms with magical triangles, which can be used to span gaps, reach higher ground, and even walk on walls and ceilings. Thanks to its freeform approach to gameplay, players have a large amount of control over how they approach puzzles, and many rooms have multiple potential solutions.

TRI is priced at $5, and is available for pre-purchase at Desura and Rat King's website.