Logic Masters Deutschland e.V.

Look-Air + Icebarn/Icewalk Hybrid:

Divide the grid into icy and non-icy cells.
Orthogonally neighboured icy cells form an ice area. Each ice area must be a square. No two ice areas (squares) of the same size may "see" each other (i.e. not have a vertical or horizontal line of non-icy cells between them). The holes inside the grid do not block vision.
Digits represent how many of the five cells forming a cross around the clue (including itself) are ice cells.

Draw a path from IN to OUT into the grid. The path travels orthogonal through the centers of some cells. On non-icy cells the path can turn, but never touch or cross itself.
On icy cells the path cannot turn, but can cross itself. The path has to go through all ice areas (not necessarily all icy cells) and all given arrows in the shown direction. The path visits every digit in increasing order.

A '?' may represent any digit (from 0-5 for obvious look-air reasons).