Warsaw-based studio Crunching Koalas has opened a beta program for MouseCraft, a side-scrolling puzzle game for Windows, Mac, and Linux (free registration required).

MouseCraft is a tile-based puzzler in which players must carefully stack tetrominos so that a group of blind mice can reach each level's exit. The game in its current state plays like a cross between Lemmings and the Gussun Oyoyo series -- not a bad combination! A fan-made gameplay sample (with Polish narration) is above.

You can leave feedback for the beta release at Crunching Koalas' forum.