Bumpy snails

This a puzzle game about snails that cannot turn around. Your goal is to get back to the start, facing the same way you started. 
Controls: 
WAD move you forward. SPACE is jump. S lets you through certain platforms. R restarts the level. Q changes snails. There is sadly no button to go back one step, which is sometimes a bit annoying fyi. You can move the camera by holding LMB and dragging the mouse and also zoom with scroll wheel.

Cetain mechanics that might be unclear. There are levers and preassure plates which actives bridges or walls. Their is a colored "lamp" under each contraption to show what it activates. Levers are pushed back and forth when you walk into to them, and preassure plates needs a snail to stand on it. 

Credit to Brian MacIntosh for the lever and preassure plates sound effects, found on opengameart dot org. 

When all 7 levels are over, the game is done.  Also, on level 7, the gap on the sides is too small which means you can jump over it. This was not intended and something I did not consider before now. If you want to do the puzzle, pretend the walls are one tile further out.