Move with wasd, arrow keys, and as a bonus you can also jump with the space bar if you want to. In some levels, you can press the s key to become small. You can also press the r key to restart the level. I found this project in my "My Stuff" folder a few days ago, and I decided to finish it. Have fun!
@Orbitron for the "Glow" effect around the hedgehog in the thumbnail. All levels are possible.