TL;DR: A short puzzle game about guiding a sleepwalker to their bed.
The action happens in a dream world with non-Euclidean topologies and art inspired by Salvador Dali's work. You control a benevolent dream cat or dog creature that tries to guide Bob the sleepwalker to his bed within dream. Bob obeys three big rules: He continuously walks forward and turns right in front of obstacles. Letting him wake up loses the game.
You can influence his movement by blocking his way with big dream apples and let him walk over crevasses using bridges made of fish. These are the only tools you get. Also some monsters and environmental objects can and have to be affected by these tools. It's very nice that you can see where Bob is going by footsteps that appear in front of him, making it easy to see what's going to happen next.
Puzzles are usually simple and easy and often have several solutions. They consist of two parts: get the apples and the fish and then use them to navigate Bob through the maze. Usually you have plenty of time to act, but at later levels you have to be fast as well. Still, the only times during the 30 levels of the game I got stuck were because of the non-Euclidean graphics tricking me into thinking I can't do something. I consider this a flaw because it was merely confusing and served only as deliberate confusion, a distraction from the puzzle.
It takes less than hour to complete the game for the first time and the subsequent speed-run achievement is not difficult to earn after you've completed the game once. After beating the game once it presents you with a more difficult "Nightmare mode". It adds to the basic levels several keys that Bob has to grab before the bedroom opens. These levels can be quirky but nevertheless not difficult.
Graphics are quite nice except for the occasional confusion they induced as mentioned above. Music consists of hazy and forgettable tunes appropriate to the dreamworld. But the voice acting! I disliked the voices that sounded like a drunken person struggling to speak with throat noises. They probably mean to create atmosphere, but to me, they were mostly annoying in their derpiness.
I should mention that I experienced problems running the game: my desktop powerhorse could not run it because of an unknown error, but I finally managed to play it on a laptop. I used mouse for the whole game despite it suggesting a controller. Mouse controls were fine but they did require a bit of getting used to. Basically, the dream cat walks towards the cursor when pressing left mouse button but then it could get stuck in the way to an obstacle - there's no pathfinding to work around this.
There is little to no story unless you consider the few cutscenes in the dreamworld a story. Basically, Bob (who apparently is a narcoleptic sleepwalker if that's a thing) falls asleep and needs to get to bed. So really the puzzles are the only thing to experience here. They can last you for three playthroughs, each one taking from 45 minutes to one hour. As it costs only 5 € I think it's worth it if you like puzzle games. Remember though it's only a short experience and there's basically no replay value afterwards. If you're merely intrigued, get it on sale.