Vessel is a challenging physics-based platform puzzler. The puzzles are pleasantly difficult, and it features an attractive steampunk aesthetic.
The gameplay in Vessel is mostly about using giant steampunk factory machines and manipulating creatures made out of water (and later, other materials) into doing your bidding. Some creatures are dangerous, but death isn’t a major obstacle in Vessel; it just resets the current challenge.
What makes Vessel so fun to play, though, is the wonderful sloshy water mechanics. It's really fun to splash through this game. The level design is creative, and the puzzles are thoughtfully made.
If you like puzzlers, Vessel is definitely worth a look. It's creative, polished, entertaining, and difficult. It's a bit pricey at $15, but look for a sale.