Escape Goat is a puzzle platformer featuring a unique take on traps and machinery. To solve each room, you must escape fearsome foes, navigate mazes, and use the environment to your advantage. Only with the help of a friendly mouse do you stand a chance... use the mouse to reach otherwise unreachable areas, and even warp to him... if you can find a magic hat! Enjoy over 50 stages of fun in this unique labyrinth adventure. - Ranked top 20 on XBLIG (out of 2500 games) - 50 puzzles organized in 10 stages - PC Exclusive bonus campaign with 50 all new levels, difficulty ranging from moderate to insane - Fully featured level editor, share creations with friends and the community by trading map files

bert263 says

10/10 - Agree (3) Disagree

This is an excellent little platformer with some cool ideas. Highly recommended!

EDIT: I am now 50% through the game. The great first impressions can definitely be confirmed.
Each "world" provides you with several new mechanisms to lear and use. The game is challenging but not too hard and never frustrating.

2nd EDIT: SPOILERS
After finishing the main "campaign", you unlock a seconed world called "All intensive purpose". There are another 40 levels or so. BUT: those are ridiculously difficult! This is practically a completely different game.
Great value for your money, but be warned: You will rage quit more than once.