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Level 305 is the 306th level of the Progressiverooms.
It presents itself as a snowy plain, with a few dormant trees lying in the distance, and a weakly clear road that cuts through. Nothing else is seen, but snow, and desolate footsteps of those who have once been in the level, which pile up in areas where you begin in.
Not like the picture you can see, as the footsteps are less in this area.
Now, as for the little hut that exists, it appears to be the only structure found in the level, and itself has been covered in several blankets. The place is abandoned, and the door is locked. Like some other levels, entry is impossible as trying to break the house ends up in failure, as the material cannot be broken, implying it may be stronger than material in real life.
Past the house is of course, more snow and trees, along with the single half-buried pathway. In order to exit, you must traverse down this path until you realize the area ends in a large cliff that offers a view into the void. Make sure you don't fall as there are little snow platforms that are found floating over the abyss.
At the end of the platforms, as you traverse them safely, is a single gate, which going under it brings you to Level 306.
Jacob Lee