Excellent game that tries a lot of interesting mechanics I haven't seen before, and pulls them off very well.
It's a procedurally generated stealth game where you must consume your cover to progress. The guards have unlimited sight range and their patrol patterns change on the fly. This makes the game enjoyably tense, and the procedural generation churns out a fair bit of variety. Being spotted is not an automatic death sentence, and scrambling to meet the level goal while pursued by alert guards is a common occurence and a big part of the game's appeal.
The procedural level generation works surprisingly well for a stealth game - everything from layouts to cover to enemy composition to level goals is put together from random parts, resulting in levels that shake up your tactics (or are borderline impossible on higher difficulties). The layouts of levels, cover and guards vary dramatically
The game can be described as "layered" - the more you play it and the further you progress, the more layers unlock. More enemies, items and hazards in the campaign, more optional challenges, and more story elements. Even as the campaign "levels up" and becomes harder, you can still control it with difficulty levels, which range from "relatively stress-free" to "not even remotely fair".
The story deserves a separate mention. It's completely optional and out of the way - in fact, you'll need to put some effort into putting it all together - but it completely changes the atmosphere of the game. Your first impression of the game will be that of an goofy, arbitrary world where you are are a robot that sneaks around eating furniture in office buildings. As the story comes together, it justifies most of game's arbitrary mechanics and reveals the game world as somewhat dark place.
The game explores its ideas to the fullest, and feels like a labor of love the developer enjoyed working on. I normally dislike rogue-lite games, but I had a blast with this one.