Huge number of more or less impossible machines inclding innovative puzzles, without boring repetitivity, embedded in a reasonable story. The hinting system will be needed once or twice, but doesn't spoiler the clues. Again, the czech developers delivered notable solid work. Seven stars. However the mouse control is annoying (no gamepad support, anyways). The game engine seems not to adopt the mouse settings from the operating system, but needs like half the table to pan one screen. Panning needs dragging, i.e. moving with the mouse button pressed. Fixing that by doubling the mouse dpi settings (refers to a SteelSeries Sensei with an integrated processor) leads to pointer losses such as false interpretations of a drag as a double click, or worse, leads to loosing a dragged object leaving unclear whether this was inusable at the tested place or the mouse drag was dropped. Also, the pointer sometimes clicks through, namely, a hidden target behind an object's surface is picket, whereas you intended to pick a visible one in front of the object's surface. Often the bounding boxes around what would be picked are not quite clear and too big. Minus three stars.